I have installed the following catalyst driver
AMD GAME! Drivers and Utilities
It includes motherboard/igp driver. that's for xp 32 bit. Select the one for your OS.
I'm using the codecs of power dvd ultra 7.
Make sure that you have in the mediaportal config the "My TV" plugin the "listed in home" enabled.
Atm my rig isn't still running yet. It seems that my TV card is broken.
I'll report on this with the terratec cinergy s-2 in this thread later...