For those of you interested in making a proper airport for your scenery, and you have 3DS Max. I've added a rather large and detailed tutorial on the wiki HERE
I guess for those of you who don't have Max you can also use it as a guide for other 3D modelling applications as well as the process is virtually the same.
This was a ton of work (maybe 100 hours of time) but I feel it will be valuable to many users.
I will be adding the last part (decals) soon but this will get you started.