I want to completely reinstall my SL onto my MBP just to have a fresh start and 0 out my harddrive. I've already backed up all my important files and everything I need, but when I put in my SL disc it tries to read it and then just kicks it out of the drive without ever showing up on my laptop. Has anyone had a problem like this? It is not the disc I used when I upgraded my MBP from 10.5 to 10.6 though because I misplaced and cannot find that copy, but I am using a friends copy (I don't think this is the problem). I know my drive should read it because it reads every other CD I put into it and it shows up on my friends MacBook as well. Any ideas?