I have recently upgraded a G4 933Mhz to os x 10.4, but I need to run one program on it in classic environment. I have an install disc for os 9.2, but when I try to boot from it the mac starts up but after a few seconds the "mac face" splits in half and the computer goes no further. (And if I copy the system folder from the CD onto the hard drive and try to start Classic, I get a message saying that it will only fun from the original disc and not if it has been copied to another disc.) Apple's web site suggests that I should install the classic environment from the "additional software and hardware test" disc but there isn't one with my os x 10.4 install dvd. (I am the second user, so it's possible that the original owner has lost discs).