Though I tested with UnrealAim, I don't play with aimbot.
But If my remembers are right, just set the sensibility and resolution at lowest, and scan size to the smallest setting. I'll check as I'm back from work, [TKC]faB.fiVe~. Add me on MSN, will be easier.
BUT as I say in readme do NOT expect this to work 100%
As Mullah says, the best way is texture hooking, like Rainer made.