diff --git a/source/wt/bmg.py b/source/wt/bmg.py
index f254279..9ebd762 100644
--- a/source/wt/bmg.py
+++ b/source/wt/bmg.py
@@ -1,12 +1,54 @@
 from source.wt import *
 
-tools_path = tools_szs_dir / ("wimgt.exe" if system == "win64" else "wimgt")
+tools_path = tools_szs_dir / ("wbmgt.exe" if system == "win64" else "wbmgt")
 
 
 _tools_run = get_tools_run_function(tools_path)
 _tools_run_popen = get_tools_run_popen_function(tools_path)
 
 
+def decode_data(bmg_data: bytes) -> str:
+    """
+    Decode a bmg file content into a txt content
+    """
+    process = _tools_run_popen("DECODE", "-", "--single-line", "--DEST", "-")
+    stdout, _ = process.communicate(input=bmg_data)
+    if process.returncode != 0:
+        raise WTError(tools_path, process.returncode)
+
+    return stdout.decode("utf-8")
+
+
+def encode_data(txt_data: str) -> bytes:
+    """
+    Encode a txt file content into a bmg content
+    """
+    process = _tools_run_popen("ENCODE", "-", "--DEST", "-")
+    stdout, _ = process.communicate(input=txt_data.encode("utf-8"))
+    if process.returncode != 0:
+        raise WTError(tools_path, process.returncode)
+
+    return stdout
+
+
+def patch_data(bmg_data: bytes, patchs: dict[str, str | None]) -> bytes:
+    """
+    Patch a file with LE-COPY. This copy the original tracks name into the new lecode track name id
+    :patchs: dictionary of patchs bmg key and value
+    """
+    args = []
+    for key, value in patchs.items():
+        args.append("--patch-bmg")
+        args.append(key if value is None else f"{key}={value}")
+
+    process = _tools_run_popen("PATCH", "-", *args, "--DEST", "-")
+    stdout, _ = process.communicate(input=bmg_data)
+    if process.returncode != 0:
+        raise WTError(tools_path, process.returncode)
+
+    return stdout
+
+
 class BMGPath:
     """
     Represent a path to a bmg file (game file containing text data)