PLEASE Help! Having Problems With Call Of Juarez for my PC

I have just got a copy of Call Of Juarez, and Ive been hearing so much about it, and Ive been wanting to play it! I loaded it up, and everything works fine. I then applied the crack files that was givin to me to get it to work. Everything seemed to work, I got it up and running. Its jsut when I load up a new game, and it goes to the loading screen, I get a a Crash Error that says
"exception:file'.\src\TerrainNew\GeoMipMap.cpp',line: 679, msg: CMipMapTerrainBlock;;BuildMipMaps(..):unsupported position stream ; terrain.mat"

WHEW!!! Does that jibberish mean anything to anyone??? Please help, I really want to play.
Thanks