I'm not sure if I've misread something somewhere, or it's because I'm a complete idiot when it comes to technical stuff, but when I try to load a PC KOTOR mod on Xbox that contains a .mdl and .mdx file (ie. New faces and clothes), KOTOR crashes. I put everything into the override folder in TDATA 4c1003, and it doesn't work...
help!

Yep, you'll get that with PC version models. The xbox doesn't care for them much. Also, the textures are - or can be - larger than the normal xbox files and may display improperly, not at all, or crash the game.

I used the large textures for some testing and the loading time and framerate dropped because of it.