So I need to update my boot rom on my G4 AGP model Powermac. I am currently running 10.4.7. OS9 was not installed on it. So I moved the OS9 folder from my Powerbook G4 to my second hard drive and told the computer to start from that folder (starting up in OS9 to update the firmware). Now the computer starts to boot and then a little disc appears with a question mark and won't do anything else? First, I don't have OS9 discs and I really need to update the rom on the AGp model. How can I do this?