Howto:Make an airport
Introduction: For changing Scenery and airports you needed Terragear, which was always very hard to use and only for Linux. With the FlightGear Scenery Designer it is also possible to make custom airports or to change existing airports in FlightGear.
What you need: -FlightGear Scenery Designer ftp://ftp.ihg.uni-duisburg.de/FlightGear/Win32/fgsd-win32-20060423.zip -Taxidraw ftp://ftp.ihg.uni-duisburg.de/FlightGear/Win32/taxidraw-win32-20061010.zip -Google Maps or Google Earth for making the runway layout -any datas about the airport you want to make
-shapes: for the whole earth ftp://ftp.ihg.uni-duisburg.de/FlightGear/TGshapes
But that's a lot of datas, so there is a another possibility: http://mapserver.flightgear.org/download.psp
-Heightmaps http://telascience.sdsc.edu/tela_data/SRTM/version2/SRTM3/Eurasia/
-Of course FlightGear - any version