Or the other question. Is this a freeware or a payware addon. I've seen many airports in "Scenery" category on this site .
Today I was testing 2 really nice done payware's.
The Pilatus PC-9 and PC-12 made by Iris which is well known in FSX and FS9 community.
The best in PC-9 is that it requires more attention from the pilot because if we incease too much the engine power it will just blow up.
Pilatus PC-9 & PC-12