Sorry but I think the Map Editor scenarios can't be used. You make a regular continuous game and use that. Now I was using that maps from the Iaam Mod too.
I'm going to try to make a map without the add-on to the map editor from Iaam. If the map works I'll reply back.
I tried to make a map to use it doesn't work. I think the map editor format is different then in game format. You might try to ask on the site they might be able to help.