I have used the Bootcamp that came with Snow Leopard to reformat my Windows HD, and managed to install XP Pro 64, but now face the dreaded missing drivers issue - the worst being something to do with the network card, as I have no access to my network or internet, although Windows says the Network Card driver is installed, it also states that several ethernet components are not installed. I've spent an hour looking through these forums, and haven't found what I'm looking for - a guide on how to install any 64-bit Windows OS on my old MP 1,1. However, I have absolutely no recollection of how I did it, and can only assume I followed something online which probably no longer exists as the world has moved on. Somehow, ages ago, I managed to install XP Pro 64-bit on my Mac Pro 1,1, running Snow Leopard, using a separate hard drive for the installation. I am a bit of a dunce when it comes to Boot Camp.