Hi all, this is my first post so please be gentil. I've just bought a MacBook (White, 2.1ghz, 1 gig ram). Thing is the previous owner had a friend install xp as he didn't like the operating system. When I turn the computer on it boots straight from xp and no choice to choose osx. I've tried holding down option which brings the selection for windows only! I have a mac mini so I tried the software disc from that (knew I had no chance but worth a try)... No joy I found boot camp on control panel, inserted mac os disc, selected it to boot from it... No joy just a White screen then black, and the xp logo starts. Any ideas how to get this vile software off my MacBook please???