Eireplane,
Absolutely! If you are using the most recent version of TTools ( I use v1.3.3), you can run the Airport Collector to add all fs2002 airports to your Airports.txt file, including the ones with no stock AI Traffic or ATC. This would make those airports available to your traffic editor, or whatever method you use to add AI traffic.
Otherwise, if you're just looking to add one airport to the Airports.txt file, you can open the airport in AFCAD, click on the Airport Reference Point and copy down the coordinates and altitude to copy to the Airport.txt file. This line came from my own .txt file and you may copy it into yours:
LFBT,N43* 11.07',W0* 0.13',1260
Good luck,
Erik
