I used my own method to do this, it's currently SEMI-WORKING.
I get into combat arms with the old HS, i can use any old hacks I want. I can use any hacks that are detected by hack shield, but not the ones patched by the change of the coding of Engine.exe (combat Arms).
The reason it is Semi-Working is because it gets a disconnection error from the server ("Connection to Server Has Ended") after about 1-2 minutes of playing.
It sends me out of my game and back into the sever selection screen and then states this error. It happens with and without hacks injected, so therefore its not the hacks.
I think I just have to change the crc or anything else that hack shield or Engine.exe might be detecting / scanning for, and it will work.
I will state how to get it running with old files later on, but for now I'll try to get this working.