Help removing default buildings

Hello, I just downloaded a good looking freeware scenery for the John Wayne, Orange County airport in Southern California (KSNA). However, I noticed that the default terminal is still showing up. I know I have to go to my scenery.cfg file and add an "Exclude=", entry, but I don't know what are the coordinates to be entered as well as what follows to that entry. Please see if you could help me. This scenery is a very good one for being freeware. Thanks, Hernan 
