There's no place to introduce myself so I thought I'd do that before posting my questions.... Hi! I'm Dee from down under (original from the US). Moved to Oz nearly 3 years ago. Ok.... I bought a MBP nearly 5 years ago, original OS was Tiger... since, I've upgraded to Leopard, to Snow Leopard. I have so much crap on my computer that it's time for a clean wipe and a fresh install of OS and apps... I've already prepared my back ups of movies/documents/photos/emails/bookmarks and the like... My question... since I bought this puter with Tiger, do I need to wipe and install with Tiger or can I just use the Snow Leopard disk? I do not intend to backup my old OS... this is a clean/fresh OS that I want on my drive... and I have all my apps on CD and on an external hard drive for reinstalling later, etc. Thanks for any advice!