Hey guys I found some information about hacks that , hacks don't work on some maps(Sineper(Galery) , Infection(Dark Chamber) ). If you play on this maps , about 5-10 mins later game will crash. But on other maps you can use hacks without any problem , as many as you wish at the same time!
This information is from my own experience i played with hacks on all maps and no problem(error) except maps mentioned above!
I think i helped to some people having problems with hacks!