Using Missions to change terrain

I'm just wondering if this is possible. I was pondering the idea of linking mission areas.
Much like how in everquest where you zone to another area. Is there a way to setup exits that when the player zones it loads a new mission? I am assuming each mission can have its own terrain and objects. I can forsee problems with the networking though. Can TGE keep track of players in different missions? Or would all players have to zone to the new mission when 1 player activated the mission load.

I am aware of some people trying to recode the terrain manager to allow for larger worlds. I am just trying to make do with what the engine has for now.

Thanks