And just to keep you guys posted, I've decided not to go and use the previous indoor layout you had seen in previous screenshots. Instead I decided to go on some actual structural pillars and points that you can see here:

This image is inside the building itself. After coming across some other references of the building (thanks Shrinker) I've found that I am not quite exactly accurate with the building. So although that's a downside I hope it doesn't effect the map in general =]
Screenshots:



I've gone and started breaking some of the structural elements, so that everything doesn't quite look the same, and as its an abandoned building, I get more pleasure in ripping it apart =D
To sum it up, This is the last of my hammer work for a while, I'll be going back to MB2 to create some specific brushes and designs for this map. So, back to Microbrush!

Let me know what you think,
- Scott.