I'll try to put here some useful info I used to set up my mythtv.

I have a Hauppauge WinTV PVR 500 and Pinnacle PCTV 50i.

Nxtvepg

To get program guide in Switzerland I use nxtvepg software. It fetch the program directly from the cable. You first have to configure it than let it run. Nxtvepg will use one of your tuners while doing so you might want to pass some arguments to choose which tuner. I use it in batch mode in a crontab with mythfilldatabase to update mythtv program database.

/usr/local/bin/nxtvepg -card 2 -daemon -nodetach -provider merged -acqonce now;
/usr/local/bin/nxtvepg -card 2 -daemon -nodetach -provider merged -acqonce near;
/usr/local/bin/nxtvepg -dump xml -provider merged > /home/mythtv/nxtvepg.xml;
mythfilldatabase --file 1 -1 /home/mythtv/nxtvepg.xml > /home/mythtv/mythfilldatabase.log

Remote control

Old: I'm using pinnacle pctv remote. You can see my .lircrc file.

2008-10-13: I'm using a Marmitek X10 remote. I'll post the config soon.