FOSS gamedev and creative worlds

How can I convert a world in regular minetest to dreamworld

go into the world folder and edit the world.mt file.
First line is gameid = minetest
change to gameid = dreamworld
be sure that the name is right. Also know that the mods need to be the same or you will get unknown blocks

Make sure you back up - copy the world folder to somewhere else to save it in case it goes wrong.

Thanks :)