Back when I was still in doubt about whether or not I should purchase the headplay and trackir I had trouble finding user experiences with such a setup. I still can't find anyone with this kind of setup, so I thought I'd post this movie to show it's both possible and extremely useful to all the people who are unsure about the purchase. Apologies for the poor quality of the vid though
http://www.youtube.com/watch?v=KGVedRJ48HQ
The vr set I used is the headplay. http://www.headplay.com