Brief installation instructions: 1. Download both Models-Airspace.tar.gz and Scenery-Airspace.tar.gz 2. Extract Models-Airspace.tar.gz into your FlightGear/data directory so that an Airspace directory is created inside the FlightGear/data/Models directory. 3. Extract the Scenery-Airspace.tar.gz file any place you like, perhaps 'next' to the top level data directory, not necessarily inside it. 4. Notice the directory that is created in step #3 ... it will be /something/something/Scenery-Airspace Add this directory to your scenery path. This could involve an entry in your ~/.fgfsrc file that looks something like: --fg-scenery=/stage/fgfs05/curt/Scenery-Airspace:/stage/fgfs05/curt/Scenery-0.9.10 *NOTE*: think about what you are doing here. You are telling FlightGear where to search for it's scenery so be careful to specify all the valid paths you want to search. *NOTE for WINDOWS users*: replace the word 'directory' above with the word 'folder' :-) If you use the fgrun launch wizard, you can update your scenery path by clicking back several times to get to the 'slightly' hidden path setting page. If you haven't done anything like this before, just engage the smart part of your brain, work slowly, read the instructions carefully, double check that you've done each step correctly before moving to the next. It's not hard, it's not very many steps, but there are plenty of places to mess up if you are careless or don't understand what you are doing or don't match up the path names correctly with where you extracted the scenery.