Buildings or Structures on maps.

This is my first time making a map. I have been able to get my items to be randomly placed on the map, but I am not sure of the best way to put buildings in. Right now that are in .dts format and I will not be going in the buildings. I think that once the building datablocks are loaded I can figure out how to drop them on the map.
Questions:
What script should they be in?
What format should they be in?
Any examples of building datablocks?
Where are they in the samples? I have tried looking in FPS and RW demos but did not notice where the datablocks are loaded?
We have also thought about making the buildings AIPlayers which cannot move or fire back. That way they can have damage emitters and be destroyed. Any ideas on that?
Any help would be appreciated.

Thanks,
-Ken