dvb-s cards are categorically not supported by mce.
dvb-t yes, dvb-s no.
so, what we need is something to make mce think a dvb-s is a dvb-t...:-)
http://www.avforums.com/forums/showthread.php?t=319927in the uk they have sky tv via satellite, as well as terrestrial dvb-t broadcasts.
I think you should be able to use this method to get your dstv working, if cam's etc are available (and using a valid subscriber card)...you would need to set your mce region to uk (or another country that uses dvb-t and the pal television system) ...germany and australia are likely candidates using pal but the uk would be good because they also use pal-i
so, yes, it is possible to use dvb-s cards in mce via this workaround...i dont know if dstv will also work...time to experiment. I know of certain users watching dstv through a pc with a dvb-s card, so I would have to conclude it is possible via mce...just not officially
happy hacking