by Boikat » Tue Jun 03, 2008 12:27 am
Some of the aircraft you loaded did not have thumbnails in their texture files. Open the texture files of your downloads, and check for a small .jpg named "thumbnail". Every FSX aircraft texture file should have one.
To make a thumb for an aircraft that doesn't have one, like anything from ny of the other fs games, I just "copy" the image to the left of the download link on the download page, then paste that into the texture file(s) of the download once they are unzipped, then rename it "thumbnail".
Some aircraft will display a default thumb on the selection panel, a little blue aircraft with a question mark. They also need a real thumbnail.

"I reject your reality, and substitute my own" Adam Savage, Mythbusters