I cheap alternative for IRTracker!..
Do a web search for "visualmouse" It works very well in FSX. Also look at http://www.efmer.eu/ Both of these are free but I have not tried the latter yet. I also downloaded intellipoint 5.5 mouse driver from Microsoft. This can be used with ANY mouse. It allows you to allocate any mouse button for any application. I set the middle mouse button for Shift-O. So in the VC, press the mouse button and you have full mouse panning. It works well with visualmouse. These programs give you left/right and up/down movement, but no in/out. But what the heck, it's free!