Thanks for the feedback. I have used gtkradiant a little bit, and I do enjoy it. That is the editor I would like to put this castle into.
I will experiment with those tools you mentioned. Do you think this will even be able to reduce down enough?
Also, is it easier to get this into Half-Life or UT? At this point I'm not picky onto which game I can get it into, I just want to try it out.