I think it's possible to do strange things like that without enhanced editor. The idea is to put units and then change terrain, or move existing units.
I don't remember exactly what is possible or not with this method.
It seems to be a very early version, names and attributes aren't final ones (archer3, 40 HP...)
[This message has been edited by chab (edited 09-15-2012 @ 04:50 AM).]