D M
I understand what you are trying to do here but I believe it only works with cable. Unfortunately, you'll have to go through Dish and get another switch. Also, if you pick up a DVR receiver with Dual mode capabilty, you will only need 4 receivers for the 5 rooms as that receiver can channel signals to two rooms.

TommyTheCat
Drop Dish and go with your cable company. I used to work for them. I saw customers get screwed over on a daily basis.

Saberis
If you are using a splitter make sure it is a high frequency splitter designed for satellite conections. A standard cable splitter will not work.