Not being a specialist in scenery design, I do it the easy-peasy way....;D...!
For all my private dirt/grass/concrete/tarmac runways/airstrips, I use this very simple, free, runway generator program from here...>>>
http://www.simviation.com/fsdesign_scenery4.htm FS2000/CFS/FS98/FS95/FS5 runway generator utility. Creates runways using a simple interface. Requires Windows 3.0 or higher. By Chuck Dome. 436K
This generates my instant runways/airstrips in FS 2000/2002/2004.....
Then to populate them with various objects, I use a combination of LAGO's FSE (Flight Sim Enhancer), and Abacus' EZ-Scenery Creator, (both Payware).
All done with easy manipulation of objects on the screen in real time..

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Paul....(Life is too short for learning "New" things!)...LOL...

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.