I think if you’re just trying to get rid of the default A320 liveries, you just have to do what he said to the generic twin engine jet default aircraft (I’m not at my desk, so I don’t know its exact name). If you change ALL of the generic aircraft to not icao_generic=0, you won’t have any generic ai aircraft, like single and twin engine piston, etc… It won’t use those liveries on the twin engine jet that represents the A320 style aircraft.