Ive been searching for a good MP map for days..

I found the settlers maps website. But when I download those they only appear between my single player custom game maps.

How can I use multiplayer maps?
And are there any maps made by fans in which you can play with 2 players against 1 or more computer controlled enemies?

The majority of the maps made are sp ones, as unlike Settler 5, where the majority of maps were mp, with Settlers 6, most people seem to prefer sp to mp mapmaking, at Settlers Maps, we only have 1 mp map, The Settlers Map Channel has a larger selection, bur still nowhere near as many as the sp maps.

As there are two different Editors, one for Rise of an Empire, and one for Eastern Realm, make sure you have the same game version as any maps you might download, the maps are usually marked to indicate which game is needed to play them, 1.2a is the original Rise of an Empire, and 1.5 is Eastern Realm.