So I put the Leopard DVD into my imac (2.4 alu) and start the install, and since it said it would take around an hour, I went to lunch. I come back, and I just have the blue colored background, a mouse cursor, and nothing else. Can't get it to do anything. So I do a manual reboot with the power button. Boots up, same thing. So I eject the DVD, boots up... same thing. Seems that something went wrong. What should I do? Boot straight to the DVD and try installing again? Or did I just bork my Tiger system and now am going to have to start fresh?