well.... this ain't gonna happen.
the size of the map is 64 x 64 tiles and 9 floors.
this is not an engine that will likely ever do anything other than retro style first person shooters. somewhere between wolfenstein 3d and doom in terms of gameplay.
if you want to try and make the style of game you are talking about, i suggest you try coppercube. it is probably the easiest 3d engine that's not "specialized" to a specific genre of game. efpse it much easier to use than coppercube, but it is intended to make a very specific type of game.
i am not a developer or involved with the creation of efpse, but the things you are talking about are outside the scope of the engine.