Haven't seen a guide as such Ian, but a lot of the information is here in various forums and common to PCI cards and stand alone receivers.
Do I take it that you have a
Skystar2 and are pointing at Astra 19.2? If so, download yourself a copy of MyTheatre 2.76 (If you are running XP) and see what you can see on Astra, there are a couple of threads regarding the use of the softcam.