Hooking up an additional receiver to current Directv setup question

[Mingy]

I have a Directv hook up question. I have been a Verizon FiOS installer the last 5 years, but I'm trying to add a new HD receiver do an existing Directv setup at my friend's place. So here is the situation as I know it: On the roof is a 4 Slimline 5 Dish with multiswitch. I guess it is NOT SWM? Or at least Directv told me that. There is only one RG6 coax coming down the side of the building from the dish that goes into a B-Band Converter which then goes into the HD receiver. I don't know the model # of that receiver at the moment. We are trying to add a second HD receiver which is model # H24 to a separate tv that is only 10 feet away. My questions is, how do I split it? What exactly do I need to do this. I'm only familiar with CATV setups, not satellite. Can you help? Thanks.