How can I convert an existing scenario map to be a new planet/destination?

[michaelncguy]

I've seen some great new mods recently for new planets you can go to. I'd love to take some existing scenario maps and convert them to new planets, but I can't find any guides/tools or instructions online.

The basic scenario editor will allow me to generate surfaces and things for the normal list of planets, but I don't see a way to save something as a new planet/destination.

And thanks in advance!