I got a little ahead of myself when installing Tiger on the G4 sawtooth I picked up at the thrift shop. It was booting os 9 and I erased and installed tiger. Probably because I reformat so many windows systems a week and just do it without thinking that the old OS might be useful. Now I find myself with a dual CPU upgrade for the Sawtooth that I can't install until I update the firmware. Which is impossible (to my limited knowledge) without booting OS 9.2.2. I would like to install OS 9 (assuming I dig up an old disk) without losing my current tiger install. I don't know if this is possible. I guess if its not I can use one of my old smaller drives to run the OS 9 installation just to update the firmware. Also, how much disk space does it take to run OS 9?