I noticed in the settings file there was a line:
GstInput.HeadtrackingEnabled 1
So I fired up tir software and joined a game. With out the tir software running you can use the mouse to look around inside a vehicle and with it running the mouse wont move the camera in a vehicle however the "game recognised" light on the camera doesn't light and the game doesn't respond to head movements.
But the fact that TIR software running disables the mouse look in game gets me hopeful and I figured I Would share.