We have just released a beta version of the SmartNAV software, which has built-in support for Vista 64-bit. They can be downloaded from the following webpage.
http://www.naturalpoint.com/smartnav/su ... loads.html
There is also a final version of the TrackIR software with the Vista 64-bit drivers available as well.
Please visit the download section of the TrackIR website.
http://www.naturalpoint.com/trackir/06- ... nuals.html