I have been playing for a long time and been seeing screenshots of CFS3. I see B-24's, nukes, trees, and pilots when you are selecting a plane and I don't have any of these. I don't know what's wrong.
B-24 and nukes come from a third party payware addon named "Firepower". Being able to see trees and stuff depends on your game settings. In your start menu there should be a tool "cfs3config" Run that and set scenery detail to at least 2 to see trees. To see the preview animations go to cfs3config custom settings - overrides and uncheck the button "dissable movie UI".