I ran a 35 pass free space erase on my power book g4 it finished and everything was working fine. so then i just decided to restart my computer and now it wont boot its stuck on the grey screen with the spinnning wheel. so far ive tried booting it from the 10.3 disk i got with my powermac g5 but that didnt work. and ive tried booting it from the single user mood and nothing happens it just goes to the apple grey screen with spinning wheel. i dont have the 10.4 disk and dont wanna but it if it doesnt work. any help would be appreciated.