I am trying to downgrade my HP pavillion dv6000 to a modded version of windows called XP SP3 crap removed edition that is optimized for gaming. My vesion of vista is slowing down this laptop wayy too much. I have burned the iso to a bootable disc, but when I boot from it, the windows installer says "Windows installer could not continue; No Hard drive was detected". I also tried opening the disk through vista, but the "install windows" button was greyed out and i could not downgrade/install it. My friend says i need to replace the hard drive in order to downgrade because its a locked HP drive. i figure somone would know a bios update or a dll file i could delete to get this working. anyone?