Okay, I'm not sure if this has be posted other places. If so don't spam me, I found and made this tutorial on my own.
First off: We need a program called SpeederXp
Once installed, the rest is simple.
1) Start SpeederXp and leave it at change windows speed.
2) Open Combat Arms and play 2-3 games
3) Once you have completed the games alt+tab to SpeederXp
4) Target Combat Arms and set the speed you want.
5) Go into a CTF and enjoy.
Note: You can also set hotkeys in the settings. =p