I know this is an old thread but having read it I thought I'd give Sans FOV another go as I have tried it before with all the problems others have had. After a lot of experiementing I hit on settings which I found flipping brilliant. I set default, max and min FOV all to 170 and all keys for changing FOV to none. In game I made sure 6 DoF was active for Track IR. I also had auto activate and restart ticked. I don't know if it had an effect but the Ecran_Wide mod was active.
When San's FOV was started and IL2 launched San's kicked in automatically. Everything looked vastly improved. Sitting normally the whole cockpit is visible, the instrument panel, mirror (in Spitfire), rudder pedals and down each side to the seat. But everything looks completely natural, there are no distortions, the dials are perfectly round and the wings are straight out with no bits missing even when looking back. It feels like you are really sitting in a plane and everything has a much more pronounced 3D effect. On the ground the runway is nice and wide and in the air the view appears far more panoramic, tracking other planes is far easier with much better SA.
Sitting normally the instruments appear further away and with my 1680 by 1050 res the smaller text is broken and difficult to read but lean forward a little and everything zooms in beautifully. This works especially well with the gun sight. Lean in and it's right there with everything lined up. In fact I think that is the biggest game improvement. I used to have the hat switch mapped to toggle FOV, gunsight view etc. etc. but that is now completely unnecessary, head movement and Track IR does it all.
I'll try and work out how to do some screen shots although I doubt they'll do full justice. I use an LG L226WTQ-SF monitor and 8600GTS card.