Try doing this.
1. unrar on desktop
2. find your combat arms folder. mine is C:/Nexon/Combatarms
3. go to the hshield folder in your combat arms. mine is C:/Nexon/Combatarms/Hshield
4. Rename HSupdate.exe in the hshield folder to anything except HSUpdate. I called mine HSupdate33.exe.
5. Open the folder on your desktop containing the hacks.
6. In the folder , right click on combatarms.exe[bypass] , and select run as administrator.
7. Keep the folder open , and run combatarms. [ the actual game , not the bypass]
8. When the game start screen comes up for combat arms , click on the button that says game start, make sure you press enter at the same time.
9. When in game , press home and arrow keys to control the hacks you want to use.
i dont know if you can run it as admin on xp but i can on vista and thats what im on. Try it, might work, did for my freind on the 64 bit xp or something.
Hope this helped