I used to be involved in setting up such a system for some of the hotels in my area and, assuming things are still the same, they actually had a seperate receiver box for each channel they wanted, installed in a central room, and these then had their rf output adjusted to different channels so that each tv in the hotel could be tuned to all the different channels. They generally only had about four to six extra channels available, and it was still a nightmare setting them up. As I said, I haven't been involved in this for a few years so, unless things have changed, you can't do this with a single box.