hey, i tried it for one game and it worked pretty well, thx!
no bann so far haha.
and as for the question on how to use it:
you need an injector programm (i used winjector); start it as admin an inject the .dll file right into the bf3.exe - pretty self-explanatory.
a black window is gonna pop up and then you can press delete to activate the hack.
press ist once more while you're in the programm itself and it's deactivated.