Yes Pete. In FSX go into scenery/world/scenery and you'll see all your
WoAI traffic files, one for each livery. Further down you'll see the
generic traffic files for aircraft, boats, carriers. They are all bgl
files. If you don't want generic aircraft to appear, rename
TrafficAircraft.bgl to TrafficAircraft.bak. The same for any of the
others that you don't want.
In FS9 it's the same path (scenery/world/scenery) but there is just one
traffic file for all the generic aircraft which is Traffic030528.bgl.
Just rename that as above. That will also get rid of generic GA
aircraft. However, there is a free programme available on Avsim called
GA Traffic by Markus Brunner, which lets you select which of your
generic aircraft appear as AI and how often, etc. Search for
ga-traffic_setup.zip for FS9 and fsx_ga-traffic_setup.zip for FSX.
Hope this helps.
Iain
Rugby, UK