Hi there, I know there are many topics addressing this upgrade (as well as many other web resources) but I am picky and specific, and I haven't been able to find exactly what I want to know, haha. Specs: 12" Aluminum Powerbook G4, PPC, 512 MB RAM, 80 GB HD. (as you can see, nothing changed from 2005...) I am currently running 10.4, but I think I would like to upgrade to 10.5. Questions: 1. Should I upgrade to 10.5 when 10.4 has such a stable reputation and has always run well for me? 2. Has anyone had trouble running 10.5 with 512 MB RAM? 3. Do I need to upgrade hardware (ram, hd) for 10.5 to run smoothly? (tight budget...) 4. What upgrade option is the cleanest? (archive, erase, etc...) I really want to go about this the right way since this computer has survived 5 years, two spills, and still runs beautifully! Thank you in advance!