I've just downloaded the trainer and after a few tries I've figured out how to work it... on most counts.
The numpad keys are working fine, but for some reason I can't get the F5, F6, F7, and F8 keys to do what they should. F1 works to activate the trainer, but as soon as I'm in game the F-keys don't respond. The numpad works fine; I hear the "activated" voice and see the effects. The F-keys aren't working, though.
I've tried holding my "fn" key and pressing the other keys and that doesn't work. I've heard of "f-locking", but I don't have a key for that on my laptop. What should I do?