I think it's time to format my PowerBook. I'm noticing a hit in performance lately, and plus I would just like a clean start. However, there is one thing standing in my way... when I bought this PowerBook it had Panther installed on it, so I later upgraded to Tiger. Is there any way to format this drive and reinstall Tiger without having to use a license? I'm not sure if we have any left over from the family pack. Thanks a lot!