I pretty much echo what the others have said so far.
1. An aggressive profile is better for looking around faster, like a hatswitch.
2. Either increase your deadband or have a button that pauses the trackir for steady gun shots.
3. I would also recommend making your X axis VERY aggressive so looking around headrests is a bit easier.
4. Diable the roll axis.
5. Program one of your joystick buttons to center the trackir.
I'm not sure if I like it yet, what I really need is some dueling to really pop my cherry on the new trackir and stick. No one has come forward yet tho.