Hi guys, thought i'd pick your brains on this fine sunday afternoon! I have a MacPro 4,1, 10.6.1 running all the latest firmware - well when i run software update it tells me my software is up to date. I want to install XP or windows 7 so i can run Excel VBA. using it through vmware fusion is too slow. as soon as i open boot camp assistant, i get the following message: "Boot Camp Assistant cannot be used. You must update your computer's Boot ROM firmware before using this setup assistant." any idea of what i can do apart from doing a clean install of snow leopard. I think the problem might have been introduced when i upgraded from leopard to snow leopard. i've never used boot camp before. thanks for your help! i really don't want to do a fresh install, even though i use time machine.