FiringSquad have recently run an article where the author attempts to install 64bit Vista on four different PC setups and documents the results.

With Microsoft pushing for increased x64 adoption with Windows Vista, going as far as including a 64-bit DVD with all retail boxed versions of Windows Vista Ultimate, and the advances to kernel security in Windows Vista x64, the time is perfect for transitioning to a 64-bit Windows...isn’t it?

To put this to the test, I decided to install Vista x64 on four different computers: my own, my brother’s, and my parents’. My original plan when starting this project was to document the software incompatibilities and idiosyncracies of Vista x64. It would turn out that I would have more than enough material for an article just talking about installation troubles.
http://www.firingsquad.com/hardware/...oubleshooting/