Original post by: robignorant ,
I have a late 2007 white macbook and i installed the trackpad from a 2008 macbook pro and its fully functional. It looks stupid cause my trackpad is silver but the button and everything else is white but i get all the gestures in lion. installing the upper case won't work and it would be too much work. the trackpad is all you would need and with some patience would probably take you a half hour. you don't need to disasseble the laptop either, just take out the battery, lightly heat the old trackpad to soften the tape and push it out from the underside. once its out pop the mbp trackpad in and connect the cables. one cable doesn't get connected but don't fret, multitouch still works.