I tried to reinstall leopard on my new unibody mbp and it wouldn't work. I started the install from within OSX and when it restarted it would just reach the gray screen and constantly restart. I don't know if its the disk or the drive.. but all I know is other disks work with the unibody and the leopard install disk works with my old MBP. I ended up just using the restore disks that the unibody came with. Has anyone run into this problem? I only tried this once so I don't know if it was a fluke or chronic problem.