I'm going to be reinstalling Tiger on my MBP in a day or two and need to know how this works so I do not lose any of my iTunes music. If I move all of my music to an external harddrive after deauthorizinng my iTunes account first, can I then authorize the music on the same MBP after reinstalling the OS (and transferring the music back via the external HD obviously)? Is there a simpler way to do this? I can't afford to lose one of my 5 machines to play the music on. Thanks for any help, I hope this all makes sense.