Here are a few horizontal-span tests I just did with Sol7. Seems like this is going to work for me for most of the gaming setups I do. It'll have the advantage not to be tied to just a single simulator app. I can do this in any game I want to play.
Eve-Online login screen in fullscreen:
http://img209.imageshack.us/img209/5708/dscf2134qz5.jpg
MSFS X
http://img81.imageshack.us/img81/3558/dscf2137au2.jpg
One feature request that I think that would benefit all Sol7 users would be a toggle key combo that would enable and disable mouse cursor correction to the same distortion as the video when in full-screen mode. That would help me greatly, because I use games that I have to click things in the UI on the full-screen often. Maybe remap where the cursor is drawn instead of remapping the mouse coordinates. Either way should fix the minor issue.
I'll add some more screenshots of other games later tonight as I play them. :)