hi, i've got an old flower power iMac that i'm having trouble with (it was freezing and now won't start up at all. i'm getting the happy mac folder and flashing question mark). i wanted to do a complete reinstall of OS 9, but the computer refuses to start up from the restore disk. i also have an external drive with a copy of the entire hard drive of an another old iMac that was running OS 9. this drive also has other material on it however and i haven't had any luck starting up from the external drive. any advice?