I have an old PowerPC based Mac which i try to get OS9.1 to boot. Booting off the CD and installing the OS went fine except for the first boot after installation. It get stuck on the OS9.1 boot logo. If I press and hold down the SHIFT key during boot to turn extensions off it boots OK. Does the SHIFT key do more than just stop the extensions from loading? I tried to move the contents of the extensions folder to somewhere else so that I could try figuring out which one is giving me problems, but I didn't get any closer. Any suggestions?