More finger gestures macbook? More 2 finger?

[Patman100]

Does anyone know if you can add more 2 finger gestures to the white macbook? i have been looking around and all i see is stuff about 4 fingers and how it might/might not work. I don't really care about 4 finger, and i am aware of that the white trackpad can only understand up to 2, so i was wondering if anyone knows how add more 2 finger gestures. Such as on the unibody macbooks, you can do two finger zoom. Instructions, websites, etc would be greatly appreciated. Thanks