If you have a DiSEqC compatible switch, you should make sure that you set the valid DiSEqC values for each satellite you receive. In the DVBViewer you can do this, simply by open the channellist, selecting the satellite and setting the proper value at the edit tabsheet.
HDTV material in europe is indeed quite rarely, but Euro1080 is just the beginning. On february the german paytv channel Premiere is broadcasting the superbowl probably free to air as HDTV event. I suppose the exact 1:1 feed of the americans - incl. commercials
If you want to know more about DVB in common and DVBViewer in special take a look at the english manual which can be found at
http://www.dvbviewer.com/~oliver.
There you also find a couple of useful tools for converting the recorded material into DivX, DVD etc.
Cheers
Christian