Randy, check here for a write up on TrackIR http://bbs.hitechcreations.com/smf/index.php/topic,329017.0.html
Also a tip from me.
don't shut off the X,Y,Z as Bino said, those axis are invaluable, BUT note that
the vertical axis can cause significant problems as a side effect of moving your head fore and aft. This is due to the geometry of the camera being higher than your TrackIR LEDs. So as you move closer to the screen, the camera has to look "down" to see the LEDs. This is interpreted as your head moving down, and makes it very difficult in planes like the F4U, where you need to move your head forward and up to look behind you.
The cure is a simple one. Reviewing Fugitive's write up, you will see the plot showing the "scaling" of the track IR sensitivity. Notice that the plot is V-shaped, meaning mostly "Symetric". If this was the Vertical axis, it would mean your view moves Up and Down from the off center position with similar amplitude to similar inputs. But the plot does not have to be v-shaped. Uncheck the "Mirror" box and then up and down can be set seperately. Turn the sensitivity for the part of the motion LOWER than the center position to a very flat slope (I believe that is the left side of the plot.). Then turn the sensitivity for the motion ABOVE center position parabolically (as shown in Fugative's example). Now your head can bob up and down to see over the nose, and behind you, but will never go below the "centered" position when you move forward or backward, or any other direction.
Hope that helps.
