I made an account to make this reply for this game (it's an awesome game) but I have sad news. According to a friend, he said everything is server sided, so it might not be possible to mod this game. For example, even if you one hit kill, after the round it will still say you lost. I'm not sure how accurate this is though, he isn't a good modder but this is what he told me. So don't get hopes up too high.
On another note, perhaps it could work with GameGuardian, has anyone tried it on this game? How did it turn out?