Tips for TrackIR:-
Set it up as aggressively as you can stand it (the less movement in real life, for more movement in Virtual Life).
Uncheck relative to plane (so when you are looking back, you lean left to look left, rather than lean right to look left).
Center it carefully, lean forward and it will improve your back views (really important in some planes (f4u, f6f etc).
Have fun, there are loads of writeup's on these boards for it.
Wurzel