hiya, the scene looks cool (it's almost there but not quite). I've just been told that with final gather you can save out the maps you generate and then bake them into the scene (thus reducing any other renders you want to do). It's just a thought. I mean waiting 4 hours just to check if something looks ok isnt really a good ide now is it? And if you have it baked you should be able to do a flythru or whatever you need to.

Alan