Hi!
There is a map eitor in the addon (Curse of the Dragon) which should be out in English-speaking countries soon. Maybe it already is, I actually don't know^^ I suppose that would be in english, then.
Otherwise.. maybe someone can translate the fan-made editor into English; I'd volunteer to do so.
Maps are automatically copied to the gamedir by the editor; as for the fan-made one I donÄt know as I never used it.