There is a way to do what you are thinking, in an in-direct way, you can make a "epic map" size, and have the top half or a top corner your starting map, and when you go to a certain spot, you go to a new part on the map, and the camera moves with you. If you look at the Aliens 2 Beta map, or the whats it called... Gah... Can't remember the name, but it was like a samus multi-player RPG, anyways, once you enter a area you travel to somewhere else, and the camera bounds change and such, kind of like what happens in uther party, sorry if I wasn't any help.
How ever, why don't you just make a big map, and teleport to different parts of it? its abit more advanced in triggers, but then your map can be hosted over battle.net (keep in mind the 4 mb map limit)