well correct me if im wrong but the controls are saved on your .GPD (Xbox) so i dont see how you would be able to replace a button as simple as "A" with a code like "TCL" (no clip)
the real question is did they remove the console out of the xbox version ? most likely NOT but they did not encrypt the .ini so u could port pc mods over and burn to a iso or use a xkey or jtag too play them.