i have an imac intel core duo 24". it recently had leopard 10.5.8 installed on it . started giving me problems with a certain program, so i took a snow leopard installation disk that my mother had that came with the newer imac and went to disk utiliity and erased w/o backing up, because i figured i didnt need to cuz my important audio files and folders were saved on external. so when i formatted this drive, now i cant install the snow because it says mac osx cant be installed on this computer!?????????????????ugggggg! gives me an option to restore from backup or restart. help please