Hi, I have a macbook pro running 10.4.11. I want to reformat my laptop and reinstall 10.4. Most of my apps can be reinstalled fine but I'm concerned about iTunes.

I'd like to back everything up in a way that saves all my playlists, iphone apps, iphone backups, etc.

Does anyone know the best way to go about this? Also, do I have to deauthorize my account for this laptop before I reinstall? Or will it not consider it a new computer.

What about iPhoto?