container logos

hey guys just a quick one i hope i have recently had to re install my fsx as something went wrong on my pc, before i did tho i had it set up well. i had managed to put the icao code for the airline somewhere in its config file and it changed the logos of the containers to match the liverry of the aircraft i was flying.Only problem is now i cant remember how to do it again. could someone please help me? i would be so greatful if you could?