For a huge base of swap color schemes and plane set ups as well as different flying fields go to the Real Flight swap site:
http://www.realflight.com/swap/index.html
For some additional
high quality color schemes and a few good planes go to:
http://www.aero3d.net
But keep in mind that you will need the add-on disks sold by Great Planes for a lot of these planes......$29 a crack!!!!
If you don't know how to add and
activate the downloads, do a search on this forum.