SkyGFX is the thing that can use the Xbox files so the better vehicle models for III and VC work fine on PC. SA is fine with these mods, not had any issues unless you try and play at a high framerate.GTA III can be modded to run close to Xbox version with some strange interactions taking place on occassion, but San Andreas is busted no matter how many mods are put on top of it. I have had occasions where the game would crash and even the save files themselves would become corrupted.