I have had Windows XP on my Macbook running bootcamp, I upgraded using a 32bit Vista Home Basic Upgrade disk. I bought through windows a 64bit vista upgrade disk. Is there anyway I can put Vista 64bit with 32bit vista already installed on my computer I only have the 64bit upgrade disk. So I can't do a clean install since its upgrade only. And I believe the Windows XP I had on here was the 32bit.