If talking about the airstairs and stuff, that's most likely AES. http://www.another company.com/cgi-local/us/iboshop.cgi?showd500!0,5965211440,D10333

That's a credit based addon for those things. FSDT is doing some other one with more accurate animations and without the need to buy credits for every airport.
It's called GSX and I recommend watching that video to get to know the potential of that new soft. http://www.fsdreamteam.com/forum/index.php?topic=4137.0