You may know about the famous head tracking motion device, IR Tracker. Free Track does the same, for free, if you have a webcam. It’s an optical tracking motion software solution compatible with many games, including of course FSX, FS2004 and FS2002. It’s now available as version 2.2 at http://www.free-track.net where you find all infos, demo videos and free downlaods.
>It’s now available as version 2.1
… Sorry, but thats wrong! Newest version is 2.2