This was posted by another member but I can’t find it. It’s much better than nothing IMO. If using the flybywire mod, it doesn’t work for me:
To get live traffic wearing appropriate A320 liveries. Here’s what I’ve done:
Open folder…\Official\OneStore\asobo-aircraft-a320-neo\SimObjects\AirPlanes\Asobo_A320_NEO
Open aircraft.cfg with notepad or your favourite text editor
under [General] add the line icao_generic=1
Save the file & close
To get rid of the generic airlines open
…\Official\OneStore\asobo-aircraft-generic-airliner-quadengines &
…\Official\OneStore\asobo-aircraft-generic-airliner-twinengines
and edit those aircraft.cfg’s from icao_generic=1 to icao_generic=0
You’ve now tricked the sim into thinking the A320 is generic & it will now pick it up for live flights. The sim only seems to pick generic models for live traffic. It wont usually be the right aircraft model but there’s a good chance it will be the right airline if you’ve installed all the A320 liveries from the latest megapack. ie instead of a Delta B737 you’ll get a Delta A320N