Hello, I just tried to install XP on my iMac C2D 20" when I run into an issue where the keyboard is non-responsive when the XP installation commences. It's fine through the dos setup so it's not an issue of missing drivers; and I don't think it's the apple keyboard as the issue as I tried to install XP on another computer with the same disk, ps/2 keyboard removed, and apple keyboard installed and the install commenced. I just noticed that there was a firmware upgrade for the Imac 20 inch model but I cannot run it as the upgrader says "this computer does not need this upgrade." Is there a way to upgrade just the Boot Rom? I think the SMC is causing the upgrader to think that the boot rom is also upgraded. Any help would be really appreciated!