This question pribably spans different topics but here it is anyway.  I have the Convair 580 Fronteir model by Greg Pepper.  The Convair panel by Alan Jennings available from Historic Jetliners Group, and an Allegheny Airlines repaint  for this model.  Now, my trouble is not in applying the textures.  I accomplished that just fine.  The trouble I'm trying to resolve is in changing the atc call from fronteir flight to allegheny flight.  whenever I make any change to that effect in the aircraft.cfg I end up either loosing the VC or else the plane won't load period.  Being a Pennsylvania native it would mean a lot to me to have this plane be allegheny all the way but I don't want to loose the VC to do it.  How can I change the atc call without effecting anything else about this plane?