Download the G3X file of the AGS Field and import it into your G3 Simulator program.
Courtesy of Jerry Roscoe
Updated Sept. 26th, 2006 with newer version plus support files.
AGS Flying Field for the G3 Simulator
Just choose "save"
File is compressed in ZIP format and will take 4-5 minutes to download by broadband connection.
 ALSO 
Here is the panoramic jpeg used to created the "field". You can use it for your own simulator.
AGSAirfieldPana_ico.jpg - 5801 Bytes
Right click here
and choose "Save to disk"