i have only tested this on vista but you can still try on other OS.
here is the tutorial:
1. download the hack
2. you MUST extract the .dll and .exe file on your desktop
3.you MUST run the .exe file "as administrator" (vista only)
4. there will be no message when you start the hack, then just run combat arms and press insert for menu
note: that the hack will not work unless extracted to the desktop