diff --git a/src/ext/io.rs b/src/ext/io.rs
index 3aafd31..f95104c 100644
--- a/src/ext/io.rs
+++ b/src/ext/io.rs
@@ -15,13 +15,13 @@ pub trait Peek {
     fn peek_exact(&mut self, buf: &mut [u8]) -> Result<()>;
     /// Peeks data from the reader at a specific offset into the provided buffer.
     /// Returns the number of bytes read.
-    fn peek_at(&mut self, offset: usize, buf: &mut [u8]) -> Result<usize>;
+    fn peek_at(&mut self, offset: u64, buf: &mut [u8]) -> Result<usize>;
     /// Peeks data from the reader at a specific offset into the provided buffer.
     /// Returns an error if the buffer is not filled completely.
-    fn peek_exact_at(&mut self, offset: usize, buf: &mut [u8]) -> Result<()>;
+    fn peek_exact_at(&mut self, offset: u64, buf: &mut [u8]) -> Result<()>;
     /// Peeks data from the reader at a specific offset into a vector.
     /// Returns the vector containing the data read.
-    fn peek_at_vec(&mut self, offset: usize, len: usize) -> Result<Vec<u8>> {
+    fn peek_at_vec(&mut self, offset: u64, len: usize) -> Result<Vec<u8>> {
         let mut buf = vec![0u8; len];
         let bytes_read = self.peek_at(offset, &mut buf)?;
         if bytes_read < len {
@@ -31,7 +31,7 @@ pub trait Peek {
     }
     /// Peeks data from the reader at a specific offset into a vector.
     /// Returns an error if the buffer is not filled completely.
-    fn peek_exact_at_vec(&mut self, offset: usize, len: usize) -> Result<Vec<u8>> {
+    fn peek_exact_at_vec(&mut self, offset: u64, len: usize) -> Result<Vec<u8>> {
         let mut buf = vec![0u8; len];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(buf)
@@ -146,109 +146,109 @@ pub trait Peek {
         Ok(i128::from_be_bytes(buf))
     }
     /// Peeks a [u8] at a specific offset from the reader.
-    fn peek_u8_at(&mut self, offset: usize) -> Result<u8> {
+    fn peek_u8_at(&mut self, offset: u64) -> Result<u8> {
         let mut buf = [0u8; 1];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(buf[0])
     }
     /// Peeks a [u16] at a specific offset from the reader in little-endian order.
-    fn peek_u16_at(&mut self, offset: usize) -> Result<u16> {
+    fn peek_u16_at(&mut self, offset: u64) -> Result<u16> {
         let mut buf = [0u8; 2];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(u16::from_le_bytes(buf))
     }
     /// Peeks a [u16] at a specific offset from the reader in big-endian order.
-    fn peek_u16_be_at(&mut self, offset: usize) -> Result<u16> {
+    fn peek_u16_be_at(&mut self, offset: u64) -> Result<u16> {
         let mut buf = [0u8; 2];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(u16::from_be_bytes(buf))
     }
     /// Peeks a [u32] at a specific offset from the reader in little-endian order.
-    fn peek_u32_at(&mut self, offset: usize) -> Result<u32> {
+    fn peek_u32_at(&mut self, offset: u64) -> Result<u32> {
         let mut buf = [0u8; 4];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(u32::from_le_bytes(buf))
     }
     /// Peeks a [u32] at a specific offset from the reader in big-endian order.
-    fn peek_u32_be_at(&mut self, offset: usize) -> Result<u32> {
+    fn peek_u32_be_at(&mut self, offset: u64) -> Result<u32> {
         let mut buf = [0u8; 4];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(u32::from_be_bytes(buf))
     }
     /// Peeks a [u64] at a specific offset from the reader in little-endian order.
-    fn peek_u64_at(&mut self, offset: usize) -> Result<u64> {
+    fn peek_u64_at(&mut self, offset: u64) -> Result<u64> {
         let mut buf = [0u8; 8];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(u64::from_le_bytes(buf))
     }
     /// Peeks a [u64] at a specific offset from the reader in big-endian order.
-    fn peek_u64_be_at(&mut self, offset: usize) -> Result<u64> {
+    fn peek_u64_be_at(&mut self, offset: u64) -> Result<u64> {
         let mut buf = [0u8; 8];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(u64::from_be_bytes(buf))
     }
     /// Peeks a [u128] at a specific offset from the reader in little-endian order.
-    fn peek_u128_at(&mut self, offset: usize) -> Result<u128> {
+    fn peek_u128_at(&mut self, offset: u64) -> Result<u128> {
         let mut buf = [0u8; 16];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(u128::from_le_bytes(buf))
     }
     /// Peeks a [u128] at a specific offset from the reader in big-endian order.
-    fn peek_u128_be_at(&mut self, offset: usize) -> Result<u128> {
+    fn peek_u128_be_at(&mut self, offset: u64) -> Result<u128> {
         let mut buf = [0u8; 16];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(u128::from_be_bytes(buf))
     }
     /// Peeks an [i8] at a specific offset from the reader.
-    fn peek_i8_at(&mut self, offset: usize) -> Result<i8> {
+    fn peek_i8_at(&mut self, offset: u64) -> Result<i8> {
         let mut buf = [0u8; 1];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(i8::from_le_bytes(buf))
     }
     /// Peeks an [i16] at a specific offset from the reader in little-endian order.
-    fn peek_i16_at(&mut self, offset: usize) -> Result<i16> {
+    fn peek_i16_at(&mut self, offset: u64) -> Result<i16> {
         let mut buf = [0u8; 2];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(i16::from_le_bytes(buf))
     }
     /// Peeks an [i16] at a specific offset from the reader in big-endian order.
-    fn peek_i16_be_at(&mut self, offset: usize) -> Result<i16> {
+    fn peek_i16_be_at(&mut self, offset: u64) -> Result<i16> {
         let mut buf = [0u8; 2];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(i16::from_be_bytes(buf))
     }
     /// Peeks an [i32] at a specific offset from the reader in little-endian order.
-    fn peek_i32_at(&mut self, offset: usize) -> Result<i32> {
+    fn peek_i32_at(&mut self, offset: u64) -> Result<i32> {
         let mut buf = [0u8; 4];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(i32::from_le_bytes(buf))
     }
     /// Peeks an [i32] at a specific offset from the reader in big-endian order.
-    fn peek_i32_be_at(&mut self, offset: usize) -> Result<i32> {
+    fn peek_i32_be_at(&mut self, offset: u64) -> Result<i32> {
         let mut buf = [0u8; 4];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(i32::from_be_bytes(buf))
     }
     /// Peeks an [i64] at a specific offset from the reader in little-endian order.
-    fn peek_i64_at(&mut self, offset: usize) -> Result<i64> {
+    fn peek_i64_at(&mut self, offset: u64) -> Result<i64> {
         let mut buf = [0u8; 8];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(i64::from_le_bytes(buf))
     }
     /// Peeks an [i64] at a specific offset from the reader in big-endian order.
-    fn peek_i64_be_at(&mut self, offset: usize) -> Result<i64> {
+    fn peek_i64_be_at(&mut self, offset: u64) -> Result<i64> {
         let mut buf = [0u8; 8];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(i64::from_be_bytes(buf))
     }
     /// Peeks an [i128] at a specific offset from the reader in little-endian order.
-    fn peek_i128_at(&mut self, offset: usize) -> Result<i128> {
+    fn peek_i128_at(&mut self, offset: u64) -> Result<i128> {
         let mut buf = [0u8; 16];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(i128::from_le_bytes(buf))
     }
     /// Peeks an [i128] at a specific offset from the reader in big-endian order.
-    fn peek_i128_be_at(&mut self, offset: usize) -> Result<i128> {
+    fn peek_i128_be_at(&mut self, offset: u64) -> Result<i128> {
         let mut buf = [0u8; 16];
         self.peek_exact_at(offset, &mut buf)?;
         Ok(i128::from_be_bytes(buf))
@@ -257,7 +257,7 @@ pub trait Peek {
     /// Peeks a C-style string (null-terminated) from the reader.
     fn peek_cstring(&mut self) -> Result<CString>;
     /// Peeks a C-style string (null-terminated) from the reader at a specific offset.
-    fn peek_cstring_at(&mut self, offset: usize) -> Result<CString>;
+    fn peek_cstring_at(&mut self, offset: u64) -> Result<CString>;
 
     /// Reads a struct from the reader.
     /// The struct must implement the `StructUnpack` trait.
@@ -299,7 +299,7 @@ pub trait Peek {
         Ok(())
     }
     /// Peeks data at a specific offset and checks if it matches the provided data.
-    fn peek_and_equal_at(&mut self, offset: usize, data: &[u8]) -> Result<()> {
+    fn peek_and_equal_at(&mut self, offset: u64, data: &[u8]) -> Result<()> {
         let mut buf = vec![0u8; data.len()];
         self.peek_exact_at(offset, &mut buf)?;
         if buf != data {
@@ -327,17 +327,17 @@ impl<T: Read + Seek> Peek for T {
         Ok(())
     }
 
-    fn peek_at(&mut self, offset: usize, buf: &mut [u8]) -> Result<usize> {
+    fn peek_at(&mut self, offset: u64, buf: &mut [u8]) -> Result<usize> {
         let current_pos = self.stream_position()?;
-        self.seek(SeekFrom::Start(offset as u64))?;
+        self.seek(SeekFrom::Start(offset))?;
         let bytes_read = self.read(buf)?;
         self.seek(SeekFrom::Start(current_pos))?;
         Ok(bytes_read)
     }
 
-    fn peek_exact_at(&mut self, offset: usize, buf: &mut [u8]) -> Result<()> {
+    fn peek_exact_at(&mut self, offset: u64, buf: &mut [u8]) -> Result<()> {
         let current_pos = self.stream_position()?;
-        self.seek(SeekFrom::Start(offset as u64))?;
+        self.seek(SeekFrom::Start(offset))?;
         self.read_exact(buf)?;
         self.seek(SeekFrom::Start(current_pos))?;
         Ok(())
@@ -358,7 +358,7 @@ impl<T: Read + Seek> Peek for T {
         CString::new(buf).map_err(|e| std::io::Error::new(std::io::ErrorKind::InvalidData, e))
     }
 
-    fn peek_cstring_at(&mut self, offset: usize) -> Result<CString> {
+    fn peek_cstring_at(&mut self, offset: u64) -> Result<CString> {
         let current_pos = self.stream_position()?;
         let mut buf = Vec::new();
         self.seek(SeekFrom::Start(offset as u64))?;
@@ -399,10 +399,10 @@ pub trait CPeek {
     }
     /// Peeks data from the reader at a specific offset into the provided buffer.
     /// Returns the number of bytes read.
-    fn cpeek_at(&self, offset: usize, buf: &mut [u8]) -> Result<usize>;
+    fn cpeek_at(&self, offset: u64, buf: &mut [u8]) -> Result<usize>;
     /// Peeks data from the reader at a specific offset into the provided buffer.
     /// Returns an error if the buffer is not filled completely.
-    fn cpeek_exact_at(&self, offset: usize, buf: &mut [u8]) -> Result<()> {
+    fn cpeek_exact_at(&self, offset: u64, buf: &mut [u8]) -> Result<()> {
         let bytes_read = self.cpeek_at(offset, buf)?;
         if bytes_read < buf.len() {
             return Err(std::io::Error::new(
@@ -414,7 +414,7 @@ pub trait CPeek {
     }
     /// Peeks data from the reader at a specific offset into a vector.
     /// Returns the vector containing the data read.
-    fn cpeek_at_vec(&self, offset: usize, len: usize) -> Result<Vec<u8>> {
+    fn cpeek_at_vec(&self, offset: u64, len: usize) -> Result<Vec<u8>> {
         let mut buf = vec![0u8; len];
         let bytes_read = self.cpeek_at(offset, &mut buf)?;
         if bytes_read < len {
@@ -424,7 +424,7 @@ pub trait CPeek {
     }
     /// Peeks data from the reader at a specific offset into a vector.
     /// Returns an error if the buffer is not filled completely.
-    fn cpeek_exact_at_vec(&self, offset: usize, len: usize) -> Result<Vec<u8>> {
+    fn cpeek_exact_at_vec(&self, offset: u64, len: usize) -> Result<Vec<u8>> {
         let mut buf = vec![0u8; len];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(buf)
@@ -539,109 +539,109 @@ pub trait CPeek {
         Ok(i128::from_be_bytes(buf))
     }
     /// Peeks a [u8] at a specific offset from the reader.
-    fn cpeek_u8_at(&self, offset: usize) -> Result<u8> {
+    fn cpeek_u8_at(&self, offset: u64) -> Result<u8> {
         let mut buf = [0u8; 1];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(buf[0])
     }
     /// Peeks a [u16] at a specific offset from the reader in little-endian order.
-    fn cpeek_u16_at(&self, offset: usize) -> Result<u16> {
+    fn cpeek_u16_at(&self, offset: u64) -> Result<u16> {
         let mut buf = [0u8; 2];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u16::from_le_bytes(buf))
     }
     /// Peeks a [u16] at a specific offset from the reader in big-endian order.
-    fn cpeek_u16_be_at(&self, offset: usize) -> Result<u16> {
+    fn cpeek_u16_be_at(&self, offset: u64) -> Result<u16> {
         let mut buf = [0u8; 2];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u16::from_be_bytes(buf))
     }
     /// Peeks a [u32] at a specific offset from the reader in little-endian order.
-    fn cpeek_u32_at(&self, offset: usize) -> Result<u32> {
+    fn cpeek_u32_at(&self, offset: u64) -> Result<u32> {
         let mut buf = [0u8; 4];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u32::from_le_bytes(buf))
     }
     /// Peeks a [u32] at a specific offset from the reader in big-endian order.
-    fn cpeek_u32_be_at(&self, offset: usize) -> Result<u32> {
+    fn cpeek_u32_be_at(&self, offset: u64) -> Result<u32> {
         let mut buf = [0u8; 4];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u32::from_be_bytes(buf))
     }
     /// Peeks a [u64] at a specific offset from the reader in little-endian order.
-    fn cpeek_u64_at(&self, offset: usize) -> Result<u64> {
+    fn cpeek_u64_at(&self, offset: u64) -> Result<u64> {
         let mut buf = [0u8; 8];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u64::from_le_bytes(buf))
     }
     /// Peeks a [u64] at a specific offset from the reader in big-endian order.
-    fn cpeek_u64_be_at(&self, offset: usize) -> Result<u64> {
+    fn cpeek_u64_be_at(&self, offset: u64) -> Result<u64> {
         let mut buf = [0u8; 8];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u64::from_be_bytes(buf))
     }
     /// Peeks a [u128] at a specific offset from the reader in little-endian order.
-    fn cpeek_u128_at(&self, offset: usize) -> Result<u128> {
+    fn cpeek_u128_at(&self, offset: u64) -> Result<u128> {
         let mut buf = [0u8; 16];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u128::from_le_bytes(buf))
     }
     /// Peeks a [u128] at a specific offset from the reader in big-endian order.
-    fn cpeek_u128_be_at(&self, offset: usize) -> Result<u128> {
+    fn cpeek_u128_be_at(&self, offset: u64) -> Result<u128> {
         let mut buf = [0u8; 16];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u128::from_be_bytes(buf))
     }
     /// Peeks an [i8] at a specific offset from the reader.
-    fn cpeek_i8_at(&self, offset: usize) -> Result<i8> {
+    fn cpeek_i8_at(&self, offset: u64) -> Result<i8> {
         let mut buf = [0u8; 1];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i8::from_le_bytes(buf))
     }
     /// Peeks an [i16] at a specific offset from the reader in little-endian order.
-    fn cpeek_i16_at(&self, offset: usize) -> Result<i16> {
+    fn cpeek_i16_at(&self, offset: u64) -> Result<i16> {
         let mut buf = [0u8; 2];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i16::from_le_bytes(buf))
     }
     /// Peeks an [i16] at a specific offset from the reader in big-endian order.
-    fn cpeek_i16_be_at(&self, offset: usize) -> Result<i16> {
+    fn cpeek_i16_be_at(&self, offset: u64) -> Result<i16> {
         let mut buf = [0u8; 2];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i16::from_be_bytes(buf))
     }
     /// Peeks an [i32] at a specific offset from the reader in little-endian order.
-    fn cpeek_i32_at(&self, offset: usize) -> Result<i32> {
+    fn cpeek_i32_at(&self, offset: u64) -> Result<i32> {
         let mut buf = [0u8; 4];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i32::from_le_bytes(buf))
     }
     /// Peeks an [i32] at a specific offset from the reader in big-endian order.
-    fn cpeek_i32_be_at(&self, offset: usize) -> Result<i32> {
+    fn cpeek_i32_be_at(&self, offset: u64) -> Result<i32> {
         let mut buf = [0u8; 4];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i32::from_be_bytes(buf))
     }
     /// Peeks an [i64] at a specific offset from the reader in little-endian order.
-    fn cpeek_i64_at(&self, offset: usize) -> Result<i64> {
+    fn cpeek_i64_at(&self, offset: u64) -> Result<i64> {
         let mut buf = [0u8; 8];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i64::from_le_bytes(buf))
     }
     /// Peeks an [i64] at a specific offset from the reader in big-endian order.
-    fn cpeek_i64_be_at(&self, offset: usize) -> Result<i64> {
+    fn cpeek_i64_be_at(&self, offset: u64) -> Result<i64> {
         let mut buf = [0u8; 8];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i64::from_be_bytes(buf))
     }
     /// Peeks an [i128] at a specific offset from the reader in little-endian order.
-    fn cpeek_i128_at(&self, offset: usize) -> Result<i128> {
+    fn cpeek_i128_at(&self, offset: u64) -> Result<i128> {
         let mut buf = [0u8; 16];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i128::from_le_bytes(buf))
     }
     /// Peeks an [i128] at a specific offset from the reader in big-endian order.
-    fn cpeek_i128_be_at(&self, offset: usize) -> Result<i128> {
+    fn cpeek_i128_be_at(&self, offset: u64) -> Result<i128> {
         let mut buf = [0u8; 16];
         self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i128::from_be_bytes(buf))
@@ -651,13 +651,13 @@ pub trait CPeek {
     fn cpeek_cstring(&self) -> Result<CString>;
 
     /// Peeks a C-style string (null-terminated) from the reader at a specific offset.
-    fn cpeek_cstring_at(&self, offset: usize) -> Result<CString> {
+    fn cpeek_cstring_at(&self, offset: u64) -> Result<CString> {
         let mut buf = Vec::new();
         let mut byte = [0u8; 1];
         self.cpeek_at(offset, &mut byte)?;
         while byte[0] != 0 {
             buf.push(byte[0]);
-            self.cpeek_at(offset + buf.len(), &mut byte)?;
+            self.cpeek_at(offset + buf.len() as u64, &mut byte)?;
         }
         CString::new(buf).map_err(|e| std::io::Error::new(std::io::ErrorKind::InvalidData, e))
     }
@@ -675,7 +675,7 @@ pub trait CPeek {
         Ok(())
     }
     /// Peeks data at a specific offset and checks if it matches the provided data.
-    fn cpeek_and_equal_at(&self, offset: usize, data: &[u8]) -> Result<()> {
+    fn cpeek_and_equal_at(&self, offset: u64, data: &[u8]) -> Result<()> {
         let mut buf = vec![0u8; data.len()];
         self.cpeek_exact_at(offset, &mut buf)?;
         if buf != data {
@@ -696,7 +696,7 @@ impl<T: Peek> CPeek for Mutex<T> {
         lock.peek(buf)
     }
 
-    fn cpeek_at(&self, offset: usize, buf: &mut [u8]) -> Result<usize> {
+    fn cpeek_at(&self, offset: u64, buf: &mut [u8]) -> Result<usize> {
         let mut lock = self.lock().map_err(|_| {
             std::io::Error::new(std::io::ErrorKind::Other, "Failed to lock the mutex")
         })?;
@@ -1291,7 +1291,7 @@ impl CPeek for MemReader {
         self.to_ref().cpeek(buf)
     }
 
-    fn cpeek_at(&self, offset: usize, buf: &mut [u8]) -> Result<usize> {
+    fn cpeek_at(&self, offset: u64, buf: &mut [u8]) -> Result<usize> {
         self.to_ref().cpeek_at(offset, buf)
     }
 
@@ -1367,8 +1367,9 @@ impl<'a> CPeek for MemReaderRef<'a> {
         Ok(bytes_to_read)
     }
 
-    fn cpeek_at(&self, offset: usize, buf: &mut [u8]) -> Result<usize> {
+    fn cpeek_at(&self, offset: u64, buf: &mut [u8]) -> Result<usize> {
         let len = self.data.len();
+        let offset = offset as usize;
         if offset >= len {
             return Ok(0);
         }
@@ -1500,7 +1501,7 @@ impl CPeek for MemWriter {
         self.to_ref().cpeek(buf)
     }
 
-    fn cpeek_at(&self, offset: usize, buf: &mut [u8]) -> Result<usize> {
+    fn cpeek_at(&self, offset: u64, buf: &mut [u8]) -> Result<usize> {
         self.to_ref().cpeek_at(offset, buf)
     }
 
@@ -1738,9 +1739,7 @@ impl<R: Read + Seek, W: Write + Seek, A: Fn(u64) -> Result<u64>, O: Fn(u64) -> R
                 "Original offset is out of bounds for u32 address patching",
             ));
         }
-        self.input.seek(SeekFrom::Start(original_offset))?;
-        let original_address = self.input.read_u32()?;
-        self.input.seek(SeekFrom::Start(input_pos))?;
+        let original_address = self.input.peek_u32_at(original_offset)?;
         let new_offset = self.map_offset(original_offset)?;
         let offset = (self.address_to_offset)(original_address as u64)?;
         let offset = self.map_offset(offset)?;
diff --git a/src/scripts/bgi/bp.rs b/src/scripts/bgi/bp.rs
index 1653e26..fc46ad8 100644
--- a/src/scripts/bgi/bp.rs
+++ b/src/scripts/bgi/bp.rs
@@ -129,7 +129,7 @@ impl Script for BGIBpScript {
         for i in self.strings.iter() {
             let text_address = i.offset_pos + i.text_offset as usize - 1;
             // println!("offset: {}, text address: {}, text_offset: {}", i.offset_pos, text_address, i.text_offset);
-            let str = self.data.cpeek_cstring_at(text_address)?;
+            let str = self.data.cpeek_cstring_at(text_address as u64)?;
             let str = decode_to_string(self.encoding, str.as_bytes(), true)?;
             messages.push(Message {
                 name: None,
@@ -157,7 +157,7 @@ impl Script for BGIBpScript {
             let text_address = i.offset_pos + i.text_offset as usize - 1;
             let old_str_len = self
                 .data
-                .cpeek_cstring_at(text_address)?
+                .cpeek_cstring_at(text_address as u64)?
                 .as_bytes_with_nul()
                 .len();
             let mut str = mes.message;
diff --git a/src/scripts/bgi/parser.rs b/src/scripts/bgi/parser.rs
index 925b7a0..2a17820 100644
--- a/src/scripts/bgi/parser.rs
+++ b/src/scripts/bgi/parser.rs
@@ -451,13 +451,13 @@ impl<'a> V1Parser<'a> {
 
     pub fn is_empty_string(&self, address: usize) -> Result<bool> {
         let start = self.offset + address;
-        let data = self.buf.cpeek_u8_at(start)?;
+        let data = self.buf.cpeek_u8_at(start as u64)?;
         Ok(data == 0)
     }
 
     pub fn read_string_at_address(&mut self, address: usize) -> Result<String> {
         let start = self.offset + address;
-        let buf = self.buf.peek_cstring_at(start)?;
+        let buf = self.buf.peek_cstring_at(start as u64)?;
         // Sometimes string has private use area characters, so we disable strict checking
         Ok(decode_to_string(self.encoding, buf.as_bytes(), false)?)
     }
diff --git a/src/scripts/bgi/script.rs b/src/scripts/bgi/script.rs
index 4cd1853..69cad85 100644
--- a/src/scripts/bgi/script.rs
+++ b/src/scripts/bgi/script.rs
@@ -129,7 +129,7 @@ impl BGIScript {
 
     fn read_string(&self, offset: usize) -> Result<String> {
         let start = self.offset + offset;
-        let string_data = self.data.cpeek_cstring_at(start)?;
+        let string_data = self.data.cpeek_cstring_at(start as u64)?;
         // sometimes string has private use area characters, so we disable strict checking
         let string = decode_to_string(self.encoding, string_data.as_bytes(), false)?;
         Ok(string)
@@ -319,7 +319,7 @@ impl Script for BGIScript {
                 }
                 let old_str_len = self
                     .data
-                    .cpeek_cstring_at(bgi_str_old_offset)?
+                    .cpeek_cstring_at(bgi_str_old_offset as u64)?
                     .as_bytes_with_nul()
                     .len();
                 let nmess = encode_string(encoding, &nmes, false)?;
@@ -382,7 +382,7 @@ impl Script for BGIScript {
             }
             let old_str_len = self
                 .data
-                .cpeek_cstring_at(curs.address + self.offset)?
+                .cpeek_cstring_at((curs.address + self.offset) as u64)?
                 .as_bytes_with_nul()
                 .len();
             let nmes = match curs.typ {
diff --git a/src/scripts/cat_system/cst.rs b/src/scripts/cat_system/cst.rs
index 4f571f5..33409f6 100644
--- a/src/scripts/cat_system/cst.rs
+++ b/src/scripts/cat_system/cst.rs
@@ -151,8 +151,7 @@ impl CstScript {
         let string_count = (strings_offset - string_address_offset) / 4;
         let mut strings = Vec::with_capacity(string_count as usize);
         for i in 0..string_count {
-            let offset = file.cpeek_u32_at(string_address_offset as usize + i as usize * 4)?
-                as usize
+            let offset = file.cpeek_u32_at(string_address_offset as u64 + i as u64 * 4)? as usize
                 + strings_offset as usize;
             file.pos = offset;
             let start_marker = file.read_u8()?;
diff --git a/src/scripts/cat_system/image/hg3.rs b/src/scripts/cat_system/image/hg3.rs
index 928f6e4..8e1fff8 100644
--- a/src/scripts/cat_system/image/hg3.rs
+++ b/src/scripts/cat_system/image/hg3.rs
@@ -90,22 +90,22 @@ impl Hg3Image {
         }
         let mut offset = 0xC;
         let mut entries = Vec::new();
-        let len = reader.data.len();
+        let len = reader.data.len() as u64;
         while offset + 0x14 < len && reader.cpeek_and_equal_at(offset + 8, b"stdinfo").is_ok() {
             let mut section_size = reader.cpeek_u32_at(offset)?;
             if section_size == 0 {
-                section_size = (len - offset as usize) as u32;
+                section_size = (len - offset) as u32;
             }
             let stdinfo_size = reader.cpeek_u32_at(offset + 0x10)?;
             if reader
-                .cpeek_and_equal_at(offset + 8 + stdinfo_size as usize, b"img")
+                .cpeek_and_equal_at(offset + 8 + stdinfo_size as u64, b"img")
                 .is_ok()
             {
-                reader.pos = offset + 16;
+                reader.pos = (offset + 16) as usize;
                 let entry = Hg3Entry::unpack(&mut reader, false, Encoding::Cp932)?;
-                entries.push((entry, offset + 8, section_size as usize - 8));
+                entries.push((entry, (offset + 8) as usize, section_size as usize - 8));
             }
-            offset += section_size as usize;
+            offset += section_size as u64;
         }
         if entries.is_empty() {
             return Err(anyhow::anyhow!("No valid entries found in HG-3 image"));
diff --git a/src/scripts/circus/archive/dat.rs b/src/scripts/circus/archive/dat.rs
index ff997d1..1f70178 100644
--- a/src/scripts/circus/archive/dat.rs
+++ b/src/scripts/circus/archive/dat.rs
@@ -229,12 +229,12 @@ impl<T: Read + Seek + std::fmt::Debug> DatArchive<T> {
         let index_size = (name_len + 4) * count as usize;
         count -= 1;
         let mut entries = Vec::with_capacity(count as usize);
-        let mut next_offset = reader.peek_u32_at(4 + name_len)?;
+        let mut next_offset = reader.peek_u32_at(4 + name_len as u64)?;
         if (next_offset as usize) < index_size + 4 {
             return Err(anyhow::anyhow!("Invalid next_offset"));
         }
-        let first_size = reader.peek_u32_at(name_len)?;
-        let second_offset = reader.peek_u32_at(8 + name_len * 2)?;
+        let first_size = reader.peek_u32_at(name_len as u64)?;
+        let second_offset = reader.peek_u32_at(8 + name_len as u64 * 2)?;
         if second_offset - next_offset == first_size {
             return Err(anyhow::anyhow!("Invalid second_offset"));
         }
@@ -248,7 +248,7 @@ impl<T: Read + Seek + std::fmt::Debug> DatArchive<T> {
             if i + 1 == count {
                 next_offset = file_len as u32;
             } else {
-                next_offset = reader.peek_u32_at((name_len + 4) * (i as usize + 2))?;
+                next_offset = reader.peek_u32_at((name_len as u64 + 4) * (i as u64 + 2))?;
             }
             if next_offset < offset {
                 return Err(anyhow::anyhow!("Invalid offset in DAT archive"));
@@ -348,12 +348,12 @@ fn is_this_format_name_len(buf: &[u8], name_len: usize) -> Result<u8> {
     if mcount == 0 {
         return Err(anyhow::anyhow!("No entries found in DAT archive"));
     }
-    let mut next_offset = reader.cpeek_u32_at(4 + name_len)?;
+    let mut next_offset = reader.cpeek_u32_at(4 + name_len as u64)?;
     if (next_offset as usize) < index_size + 4 {
         return Err(anyhow::anyhow!("Invalid next_offset in DAT archive"));
     }
-    let first_size = reader.cpeek_u32_at(name_len)?;
-    let second_offset = reader.cpeek_u32_at(8 + name_len * 2)?;
+    let first_size = reader.cpeek_u32_at(name_len as u64)?;
+    let second_offset = reader.cpeek_u32_at(8 + name_len as u64 * 2)?;
     if second_offset - next_offset == first_size {
         return Err(anyhow::anyhow!("Invalid second_offset in DAT archive"));
     }
@@ -362,7 +362,7 @@ fn is_this_format_name_len(buf: &[u8], name_len: usize) -> Result<u8> {
         if i + 1 == mcount {
             break;
         } else {
-            next_offset = reader.cpeek_u32_at((name_len + 4) * (i + 2))?;
+            next_offset = reader.cpeek_u32_at((name_len as u64 + 4) * (i as u64 + 2))?;
         }
         if next_offset < offset {
             return Err(anyhow::anyhow!("Invalid offset in DAT archive"));
diff --git a/src/scripts/circus/audio/pcm.rs b/src/scripts/circus/audio/pcm.rs
index 75b8d38..b08bb60 100644
--- a/src/scripts/circus/audio/pcm.rs
+++ b/src/scripts/circus/audio/pcm.rs
@@ -552,14 +552,14 @@ impl PcmDecoder {
         let mut v1 = a1;
         let mut v5 = 1;
         for _ in 0..0x1000 {
-            self.unk_6a16c8[v5] = self.encoded.cpeek_u8_at(v1)?;
+            self.unk_6a16c8[v5] = self.encoded.cpeek_u8_at(v1 as u64)?;
             v1 += 1;
             v5 += 2;
         }
         v5 = 0;
         for _ in 0..0x800 {
-            let v7 = self.encoded.cpeek_u8_at(v1 + 0x800)?;
-            let v8 = self.encoded.cpeek_u8_at(v1)?;
+            let v7 = self.encoded.cpeek_u8_at(v1 as u64 + 0x800)?;
+            let v8 = self.encoded.cpeek_u8_at(v1 as u64)?;
             self.unk_6a16c8[v5] = (v7 >> 4) | (v8 & 0xF0);
             self.unk_6a16c8[v5 + 2] = (v8 << 4) | (v7 & 0x0F);
             v5 += 4;
diff --git a/src/scripts/escude/archive.rs b/src/scripts/escude/archive.rs
index df3cb50..5d6663a 100644
--- a/src/scripts/escude/archive.rs
+++ b/src/scripts/escude/archive.rs
@@ -249,11 +249,11 @@ impl<T: Read + Seek + std::fmt::Debug + std::any::Any> Script for EscudeBinArchi
         let entry = &self.entries[index];
         let name = self
             .reader
-            .cpeek_cstring_at(entry.name_offset as usize + self.file_count as usize * 12 + 0x14)?;
+            .cpeek_cstring_at(entry.name_offset as u64 + self.file_count as u64 * 12 + 0x14)?;
         let name = decode_to_string(self.archive_encoding, name.as_bytes(), true)?;
         let mut data = self
             .reader
-            .cpeek_at_vec(entry.data_offset as usize, entry.length as usize)?;
+            .cpeek_at_vec(entry.data_offset as u64, entry.length as usize)?;
         if data.starts_with(b"acp") {
             let mut decoder = match super::lzw::LZWDecoder::new(&data) {
                 Ok(decoder) => decoder,
@@ -285,7 +285,7 @@ impl<'a, T: Iterator<Item = &'a BinEntry>, R: Read + Seek> Iterator
             Some(entry) => entry,
             None => return None,
         };
-        let name_offset = entry.name_offset as usize + self.file_count as usize * 12 + 0x14;
+        let name_offset = entry.name_offset as u64 + self.file_count as u64 * 12 + 0x14;
         let name = match self.reader.cpeek_cstring_at(name_offset) {
             Ok(name) => name,
             Err(e) => return Some(Err(e.into())),
diff --git a/src/scripts/yaneurao/itufuru/archive.rs b/src/scripts/yaneurao/itufuru/archive.rs
index 07544d1..566e015 100644
--- a/src/scripts/yaneurao/itufuru/archive.rs
+++ b/src/scripts/yaneurao/itufuru/archive.rs
@@ -257,9 +257,9 @@ impl<T: Read + Seek + std::fmt::Debug + std::any::Any> Script for ItufuruArchive
             ));
         }
         let entry = &self.files[index];
-        let file_offset = entry.offset as usize;
+        let file_offset = entry.offset as u64;
         match self.reader.cpeek_exact_at_vec(
-            file_offset + self.first_file_offset as usize,
+            file_offset + self.first_file_offset as u64,
             entry.size as usize,
         ) {
             Ok(data) => {
diff --git a/src/scripts/yaneurao/itufuru/script.rs b/src/scripts/yaneurao/itufuru/script.rs
index b8ca3de..25be5f0 100644
--- a/src/scripts/yaneurao/itufuru/script.rs
+++ b/src/scripts/yaneurao/itufuru/script.rs
@@ -131,7 +131,7 @@ impl Script for ItufuruScript {
         let mut messages = Vec::new();
         for i in self.strings.iter() {
             let str_pos = i.len_pos + 2; // Skip the length bytes
-            let s = self.data.cpeek_cstring_at(str_pos)?;
+            let s = self.data.cpeek_cstring_at(str_pos as u64)?;
             let decoded = decode_to_string(self.encoding, s.as_bytes(), true)?;
             messages.push(Message {
                 name: None,