keepingf your GA traffic.  Figured it out last night and it made life so much easier.  Sometime ago I deleted, probably on accident, the default MD-80 that you see flying around with the Airwave textures.  I downloaded and installed quite a few WOAI packages over the weekend and installed them.  I also wanted to keep my GA traffic because I created some around my home airport.  So, the thing to do is delete the default MD-80 or 83, whatever it is.  Next, decompile your "AircraftTraffic.bgl" using AIFPC.  Edit the aircraft.txt file and change all of your commercial traffic, the Airbus, the 737, the 747, and whatever other airlines you want to lose and change all the aircraft names under those AC#'s  to the MD-80.  Now, compile it using AIFPC and move it back to your scenery folder and your done.  All of your default AI commercial traffic is gone, but you've still got the GA.  Simple and painless, took me five minutes.  Figured I'd share as I've seen this topic discussed here a few times.