Soon I plan to upgrade my Powerbook G4 (1.33ghz) to OS 10.5 (from 10.4). I plan to reformat my drive when I do this. I have an iPod Touch and I am worried that all of my data will be lost. Is there anything I should do to prepare for this? How does it work with my profile? After I reformat my drive, how do I get all my apps back as they were on my iPod? I also plan to reformat my iPod Touch afterwards if all goes well with my OS 10.5 upgade. Is there anything special I need to do like backing up my profile? Thanks.