I recently got a free Powermac G4 400 (PPC) from a school that I work for that was clearing out their old computers. As of now, it is running OS X 10.3.9, and I wish to upgrade it to 10.4, as the processor is too slow for 10.5. However, the machine has a password still in use, which I need to start the upgrade process. I looked around online to find ways to reset the password, but none of them have worked as of yet. Any ideas on how to do this?