I was having some issues with freezing up and getting odd kernel messages on my Power Mac G5. I read on some mac forums to try re-installing the OS to correct any corrupt files. SO....I put in the disc and it told me it was going to move the current OS into a Previous Systems folder and that it couldn't be used to start up the computer. I thought that was fine since it seemed to be corrupted and I was installing the original version anyway. Well, in the middle of the re-installation process...it stopped, said something was wrong with the disc and I needed to restart. WELL....now it won't restart because there is no OS to restart with. The old OS version is in a previous systems folder and the original was never fully installed. If I put in my Leopard upgrade DVD, it won't install 10.5 because it can't see my previous 10.4 version. If I don't put any disc in, all I get is a little folder with a blinking question mark. Anybody know a way to get the version that is in a Previous Systems folder back so at least it can start up?!?!?!