On 16 Jun, 2007, at 1:39 PM, Bruce Ryan Nakamura wrote: > Since I also own a MDD, I can verify that the retail edition of OS > 9.2.1 > cannot be installed without wiping out the OS X on it and vice-versa. Have you tried doing a "Clean Install"? It seems strange that you cannot select the option for a "Clean Install" of OS-9.2.1 during the first phase of the installation procedure. You should boot to the install CD and select the option for that. I have used this technique many times to install OS-9.x as the Classic environment on everything from a Bondi iMac to G4 eMacs and towers.