This is a collection of links that used to be extremely helpful for collecting my own experience with FS9.
  • The FS Developer Forum aims at developers and those interested in the inner workings of Flight Simulator. There you will find a large community of like minded devlopers as well as technical articles and software.
  • Rhumbaflappy, who is known for very good scenery tools, offers free mesh scenery on his dedicated website. The CFS2 meshes offered there work for FS9 as well, and its quality is excellent.
  • The direct way to make scenery BGL files is Microsofts resample.exe tool, which is part of the FS9 SDK. It's explained on the resample website in detail.