I recently ran software update after being away for a while, and it managed to REALLY mess up my PowerMac G4 (10.28). I was forced to install another os on my machine. I did this, and it worked, but all of my preferences, etc. were messed up because the disk would not allow me to preserve my user settings (I have no idea why). So, I did the dumb thing and moved my "previous systems" folder to the trash so I could "start fresh" (I know, I know). Now, when I start up, it goes to the gray "spinning gear" (with the dark gray apple) screen and stops there. I can't start up from the os x cd by holding "c", I can't do the Apple+control+P+R PRAM reset, I can't hold down x, or start up in safe mode. What should I do?I would even be willing to reformat my drive if I could get the cd to run. Any help would be GREATLY appreciated. Thanks!