So how do I pack my island for sharing?

Let's say I've made an island/worldmap/whatever with multiple levels. How do I pack it up for sharing here?
Open source game community & development
http://forum.freegamedev.net/
manuel {l Wrote}:If you don't want to see your world in-game, change hide-from-contribs to #t. (Don't know why this option is in there, but okay...)