I have only 1 small window in this bonus room. This window will have shutters. In addition, I plan to put a entertainment center in front of the window. This will eliminate all possible light into the room. Making the room smaller on the sides should not be a problem, I have knee walls that are 5 ft high which should eliminate the parrell wall issues. Forgive me on the extra dedicated circuit lines, but why do you need more than two. If you dedicate one for video and one for audio, would this be enough? Finally, I have the every room in the house with structured wire (CAT 5). In the bonus room, I have multiple TV cable and phone lines for my TiVo.
Also, should I do anything to the floor?
Also, should I do anything to the floor?