UV mapping and removing hidden faces? So, I made a geometric realistic house Buuuttttt, I didn't know importing to a game was going to be a NIGHTMARE! I have spots that appear to be missing, that is "invisible", and when I try to UV-map them automatically I get very bad results. How can I quickly remove the interior faces "that will never be seen by the player" and then UV-map this thing so I can go into Mudbox and make this puppy super texture realistic THEN import it into UDK without a hitch? In the future I might just make simple rooms and wood blocks that are pre UV mapped and then build the house from assets in UDK. But, so i don't feel this entire house project was a waste of 3 days of off-and-on work, how do I go about the easiest possible way of getting this bad boy ready for my game engine?
If you're looking for a quick way to delete faces that will never ever be visible from the outside, you're in luck. If you're trying to do something more complex, you're going to be stuck with manual work.

To delete these inside faces, select everything using A. Then switch into face mode Ctrl-Tab>Face. Set your camera to orthographic Numpad-5. Finally enter each one of the side/top views, use Box select with MMB to de-select all the visible faces. You will need to do this for all 6 views: The short cuts are 1,3 and 7 for front, right and top (respectively) To get back left and bottom, combine  1,3 and 7 with Ctrl to get back, left and bottom (respectively). The selected faces you will now have are the inside faces. Delete them.