It's some years since I tried this, but there was a trackir type freeware application that did its best to replicate what a trackir does in CFS2 on the basis of where you pointed your 'mouse' with your head (it effectively divided the screen up in to regions that acted like buttons, if I remember rightly - looking at the top middle would be the same as looking up with the high hat, etc.)
I can't for the life of me remember what the app was called, or how it worked properly - but maybe one of the guys out there can help.
What is one of those joytomouse/mousetojoy deals?
It worked a bit, but nowhere near well enough to be properly functional, which was a pity because I really felt not having trackir when trying CFS2 out again after a period in IL2. So much, in fact, that I never really came back to it...
Best of luck working something out!
Pads