Does anyone know why Boot Camp doesn't officially support 64 bit versions of Windows XP or Vista? Link Has anyone tried installing 64 bit Windows anyway, and what were your results? I'd really like to install 64 bit Windows to take advantage of my 4 GB of RAM... Any thoughts/experiences would be greatly appreciated! Edit: I'm asking specifically about 64 bit Windows for Macbook Pro. Apparently, Apple officially supports 64 bit Windows for Mac Pros as of January -- just wondering if this has since spilled over to other Macs like the Macbook Pro. Thanks!