The VFX-1 had some of the best support of any HMD at the time, mainly because most of the other units available had no head tracking.
Here is a great page with info on the VFX1: http://www.vfx1headgear.123.fr/index.ph ... ntent&id=1
You should also look up the VFX3D. It was the "newer" version that was higher resolution, but with a lower field of view, worse colors, and standard VGA compatibility. It is actually nothing more than a pair of i-Glasses jammed into a VFX1 shell with some new decals!