FS9 XML FS9GPS.dll Map Icons

Ok, so I'm trying to figure out how to customize the displays of the an XML map as far as what icon it uses to display the Airports and VOR's and such. I don't mean to just change them using the <DetailLayerAirports> variable, I mean to be able to change the actual images of the Airports from the ugly colors it uses to the ugly shapes - while this is great when programing a Garmin GPS, it's not so great when you want to make a ND for a Boeing or and Airbus, etc. because, well it just doesn't look right. :( :( I've heard from Fr. Bill that to do this you would have to figure out where all the Airports are - Get the information from FS some how - and then tell it to display your own custom image for the Airports. Repeat for the VOR/NDB/INT.. I've seen it down before, I'm fairly certain Fr. Bill has done it on his B787 Navigation Display, and I've seen it on Ed Cox's cockpits but I'm not sure if it was XML or not - but I've see the final product I've tried to achieve.I was hoping someone on here would be able to at least point me in the right direction. I've seen little to nothing on this as far as examples or text or anything goes. :( Thanks for anything!