G4 iBook, 1.42 GHz PPC, 1GB ram, 80gb HD, 10.5.8 Bought this iBook to run a huge DRM library collection for PPC only. Questions: 1. Have tried several System Installer DVDs of mine from older machines (none PowerBooks) but none are recognized by the iBook. Do I have to have a specific iBook Leopard Installer DVD? 2. Is it possible to back install Tiger if I can ever get to boot from a Tiger Install DVD. Do I need a iBook Tiger installer DVDS? 3. Why can't I change the name of the administrator account. If I am the only user? Do I need to boot from an installer DVD?