Funny, I got the 737-700, CRJ-200, CRJ-900, and ERJ series to work with no problems just by adding them like any other aircraft. I have custom sounds for all, and a custom panel for the ERJ. The others are defaults. I also added the 757 series, but have yet to fire up FSX. That, too, has custom sounds and panel. Granted, there's no thumbnails for the majority of them by default (some came with them; others I made), but they still show up.
Flying an aeroplane with only a single propeller to keep you in the air. Can you imagine that? -Capt. Picard