There is a fantastic little program (freeware) called “EZdok_walk_camera” so you could simulate the head turning inside the virtual cockpit using the mouse to see around and also walking inside the aircraft and also walk around outside the plane at spot plane view. Mentioning here just in case you have missed the original developer’s announcement at the AVSIM site. It is definitely a must have which has added much to the simming pleasure and realism.
Try the link
link for addon:
Get to AVSIM site for the full announcement and the discussions which follow at the FSX forum