This doesn't belong here, but if you need help I supose this place will do
Question 1: Have you really unistalled the game tottaly and than installed again?
Question 2: You sure the patch your using is for Goty and not for Resistance?
Question 3: The game you have is original?
Possible Solution: The last problems like _No entry model.special and no entry config.bin/cfg weapons/ m4 and no entry 'model' have one explanation, a bad addon :-\ If that is the only problem you have, than search no more, your problem is the addon not the game ;D
Possible Solution: If the problem persists when installing the patch, than make sure you use the patch with no addons inside the game (let BIS ones stay) and than make sure that the patch is really for goty