Well, I don't know where to look, but I would like to know how to add a image to a specific portion of a custom airport. For example, a logo on the apron.

I think the easiest way would be to create a textured polygon using something like SBuilder(X) and placing that in the scenery. You would need to create the image to use as the texture for the poly. I certainly did this with airport names when developing some Golden Age airports.

(butting in...) I can make a textured poly in sbuilder no trouble - as long as it's an "in game" texture... I can't seem to figure out how to add my *own* texture though, I wanted to "paint" the airport name on the exsisting apron of an airport I worked over, I thought it would be as easy as slapping a poly on there with a "magic color" as the background so it would be transparent, but I haven't seen any info on how it's actually done...