I dont know much about all the technical mumbo jumbo, but could the problem be within the .REz files, with all the player skins and models, it looks like maybe the textures might of been deleted from the .REZ file or something, dunno if thats possible though.
Also and im not trying to sound like an ass here, but is it a legal copy, if you've downloaded it, then you get problems with games occasionally that way, i would assume