I have the P8Z68 Deluxe board and have went over this guide. After I take out the iBoot disk and try to put in SL it will try to load up the install but it fails. I have tried the 2 following ways; PCIRootUID=1, it will get past the Apple logo with a darker gray screen and the spinning color wheel then it will just turn my computer off; and PCIRootUID=0, it will just stay on the first Apple logo then the apple gray screen of death or whatever it is called lol. Any help would be greatly appreciated.