Ok I recommend no fog + no recoil + no spread. If that doesn't make you bad ass at CF, you will never be either no matter what hack you are using. No fog let's you see the zombies a lot better for aiming and with no recoil + no spread you will find it lots easier to aim correctly.
I usually don't use hacks at CF because I nearly always finish as no 1 no matter what but with this I'm bound to get 100's of more kills than the other players. This is something you can perhaps find in public hacks, otherwise go buy VIP most of them have all those things (I have VIP).