Hi guys I am already running 10.8.2 but I want to do a clean install. I dont have a 8GB USB drive so my only option is DVD... 1. DVD R or DVD RW? Any diff? I have both.. 4.7GB 2. When I try to use disk utility to burn the InstallESD.dmg file it says there is not enough space on disk for some strange reason..only way I can do it is to use finder.. load the disk, drop and drag and click the burn icon on the left. That seems to get the file on... BUT I have tried click C on reboot.. does nothing... clicking option reboot only shows me my HD icon and no DVD option. I must be doing something how do I make this DVD bootable?