I see that someone recently hacked an older Macbook Air to use the 4-finger gestures of the new Macbook/MBP/MBA's. I have an older Macbook Pro. Hasn't someone figured out how to use 3-finger gestures on them yet? All I really want to do is the 3-finger swiping for forward and back in Safari, etc. Let me know if I have just missed it, but I can't find it anywhere! Help a brother out.