FSX Airfield Design

I want to start making airfields, particuarly bush strips that don't come with FSX. VOZ FSX isn't out so I wanna do it myself. What programs should I use and do you hav any tips?
Thanks
Will
Thanks
Will
Flight Simulator and other chat
https://forums.simviation.com/phpBB3/
https://forums.simviation.com/phpBB3/viewtopic.php?f=16&t=38256
I heard - and I may be wrong because I"m not into scenery - that AFCAD may not be 100% FS-X compatible. However, since FS-X is backward compatible to FS9 SDK, this may not be a serious limitatio, unless you want to get FS-X only features.
To the scenery gurus, is this correct?