49ford, your Primestar dish will work well for you. The LNB is a bit old, but should do the job with one addition--a DirecTV-style 3 x 4 multiswitch. These can be had very cheaply. You would connect the H output from the LNB to the 18V input on the multiswitch, and the V output to the 13V input on the switch. You can connect up to four receivers to the outputs. The multiswitch allows the receiver to select horizontal or vertical polarities by switching voltages, as it would normally do with any regular LNB. You could also buy a new LNB for the dish, but the multiswitch is probably your cheapest option.
I'd personally replace that LNB with a bandstacked one from a Superdish (also found very easily, and usually for free), but I'm not going to advise someone new to the hobby to jump in with a bandstacked LNB (Anole would probably disown me!)