I have never seen a Primestar dish or LNB but if the LNB is linear (V and H) then the FTA receiver can use it. Simply configure the dish as Port "A" on the
DiSEqC switch. But you only need a switch if you are using multiple dishes or using multiple LNBs on one dish -- ie: pointing at more than one satellite. Now if the LNB has separate V and H outputs then you will need a 3X4
multiswitch (perhaps that is the switch you are talking about). You don't need to configure the receiver other than to specify the L.O. frequency which should be indicated on the LNB.
kat