Im trying to help my cousin fix her ibook G4. It gets stuck at the Apple Logo with the Loading circle. I searched the forums and tried the Command-opt-p-r, single user mode, reseting to factory settings, charging, almost everything. The only option im left with is rebooting of cd/dvd. The only problem is that she doesnt have here osx discs anymore. I have mine, but they are tager and she is using something else. (I think it may be panther). Would booting from Tiger even though she may be using Panther harm it anyway?