Hi - I have a Power MAC G5 that "has" Tiger 10.4.2 on it. The problem is that it wont boot past "login window starting". So I decided to buy Leopard. Problem is that it keeps kicking the DVD out during the "c" boot. Now Im told the system might need a firmware update for the DVD player. "Apple Superdrive Firmware Update 2.1". Heres my problem: I cant boot into Tiger. I get stuck at the login screen. So I want to know if there is a way to do a firmware update in "Single user mode". Thanks.