The import/export on the TWGS is to get the TWA's like Coke said, but if you have tried to use it while the server is running it won't work, you have to stop the server to get it to work, if you need to know how to use it ICQ me and I will help you thru it, or you can get any sysop to help you on this, it isn't really that hard you have to get some TWA's to be able to import to the TWGS I have some on my main site for my TWGS and forum, and Vader has some as well. Also I think there is a coast games page that is still floating around with TWA's on it too. I think this is the page from coast games:
http://www.coastgames.com/files/index.php
I hope this helps you out, to export you have to hilight a game on the list showing the games on the window that has the game bang and editor, and hit the archive and click the export to export a game you made to where you tell it to send it on your computer, then you can share the game data with others like we all do when we can.