If the satellite dish has a dual or Twin LNB you can just run a second line from the satellite dish to your room and hook up a receiver to it. If it doesn't, switching the LNBs on the dish's arm to a twin or two dual LNBs and the proper switch is a snap. But in any case, you MUST run a line directly from the dish to the second receiver. You cannot just "split" a cable on DBS systems. There is a long technical explanation, but the answer remains the same.
The other thing that can be done is split the signal coming OUT of the receiver and run a cable to your TV. The disadvantage is that you can only watch one channel on both TVs. I did this for a while with my downstairs TV and my second bedroom TV since they were rarely used at the same time.
See ya
Tony