you need to create a bit of ‘land’ as a ‘.bgl’ file. something that AFCAD doesn’t do. no idea how to do it myself, and i think its quite complex (not meaning to put you off). you need some kind of scenery creation software – ive just looked on avsim, perhaps these are what you need:

SBuilder 2.05
FSDEM 1.1
rwy12_program_v1.2.zip
http://www.rwy12.com/rwy12/index.php – once ‘built’ u can have items on your island like buildings – it allows you to place objects in flight sim – MASSIVE set of downloads though (u need to download the object files)

if you were building your airport on land already available, and flat, it would be much easier, but hey. here, you want to create a new piece of land, which is altogether more complex. try the microsoft flight sim official website developers section to see if there are any SDKs that you need – ‘Software Development Kits’

if i am talking utter gibberish, then please, someone feel free to correct me

hope it helps

No Adam, That’s great help! thanks 🙂