Here is another one
If anyone wants to use the greedygammon.exe that allows selection of theme folders you can get it at
http://greedygammon.com/download/GreedyGammon.zip
You will have to manually place the file in your greedygammon program files folder.
You can add folders of your own images. Each theme will be a subfolder of the fullscreen folder.
So for example you will have fullscreen-> forest for original current theme
Then you can add different folders like cafe, paintings, city landscape, etc and the one you select will show up with thumbnails when you start the game.