Hey, the speed hack works great for me. No problems.
Here are the steps i use. (VISTA)
Open perx as ADMIN
Make sure its set to inject to Engine.exe (the capital E in Engine is needed)
Add NBspeedhack.dll
Add NBproductions.dll
DO IT IN THAT ORDER.
Make sure its on auto inject for both.
Make sure its set to close when finished.
Open Combat Arms
Run Combat arms
IF you have time too, set the speed to what ever is needed for the speed hack you are using. (there are 3 different kinds you can do). I set it to 1.3 before the CA window opens and click ok. DO NOT USE YOUR KEYPAD ON THE RIGHT TO ENTER THE NUMBERS.
Hope this helps. If so, click that little blue button that says Thanks