I recently bought a cheap eMac which used to be a networked terminal at a university. I am hoping to do a clean reinstallation of Tiger but the computer seems to be tightly locked down. I am able to log in because I have a local username and password, but I do not have administrator privileges. There is also a firmware password so I am unable to boot from the installation DVD. When I insert the Tiger DVD, I am unable to restart the computer and start the installation because it requires administrator authentication. Is there any way to disable the firmware password and the admin password so I can basically remove everything and start with a fresh copy of Tiger? Thanks.