This is how to get CE working on Combat Arms.
First, open your MPGH public hacks and start CA. Play a few FULL games. Open CE and attach it to Engine.exe. Set the speed from anywhere between 2-4 (Any more than that and you will lag).
Keep the sleeptime as it is.
Note: If at first you don't succeed, play more games before you attach it to Engine.exe
P.S. thank me if I helped