I think this case is slightly different than what I've seen posted about Formatting and Backing Up..(sigh) I took my Powerbook to an Apple Centre in Seoul, Korea (where I am living now) after Disk Utility told me I need to make repairs. The service people managed to save all my data from the powerbook(preferences, user data, apps, keychains etc.) to my external hard drive, and then they formatted the computer and installed tiger. I now have my computer with all my previous data safely in my external..how do I get all my preferences, user data, apps, keychains etc. back to they way it was? I don't think they did an archive install or anything like that. It looks like they just formatted everything and made up some user name and gave me back my computer. Should I take it back to the Apple Centre? Help please, and thanks for your patience!