[CHAOS] Several Questions

[FlawlessHappiness]

#2 You can place the sounds under "Ambience" in your map. They do make a great ambience.
Also check how FC did it F.x. with the wind sounds around holes in the roof.

#3 Depending on you story, and will, but i suggest not making too big rooms! Unless there is a purpose. Big rooms usually end up with emptyness or people just threw random stuff in there to not make it empty.

#4 How about using -1 instead of 1? Assuming you are using: SetMoveObjectState