Came across this article by accident when searching on Internet.
http://naturalpointofview.blogspot.se/p/trackir-cameras-with-freetrack.html
I now have a 120 fps camera on Freetrack.
The only reason I went this route is due to NP's comments on my dissapointment that can be read here:
http://forum.naturalpoint.com/forum/ubbthreads.php?ubb=showflat&Number=48406#Post48406
I have been enjoying System Shock 2 with FreeTrack and TrackIR 4 camera.
With this method many older games can be enjoyed.
Had NP kept mouse emulation in their newer software they would of had me as a satisfied customer.