Re: nvidia x64 drivers??
Slightly off-topic, reply :
This world is not yet ready for 64bit, so skip your self a frustration and install a 32-bit version of OS. I thoroughly test XP-64-bit and apart from most applications running fine, the drivers are VERY rare to find for most hardware.
Are looking to have a workstation with large amounts of RAM (Over 3GB)? Because that's the only reason to install a x64 version of any OS right now. Up to 3GB of RAM you can use any 32bit OS successfully.