This is the COMPLETE list of airline callsigns used in FS2002.
Simply replace the airlines.cfg file in your FS2002/aircraft folder to make available all the callsigns used by FS2002 ATC.
...and yes, Microsoft did leave out Southwest.
Enjoy!

Richard Taylor
richardht@loop.com
CEO, MaxFreight  http://maxfreight.cjb.net
VP, Group Flight  http://groupflight.cjb.net