The syntax for DVDviewer's ini files is different to ProgDVB's. Check Bluemotion's file for example syntax, create a new cable.ini and include your own symbol rates and frequencies. Make sure you change the name under "2=" to something you recognise, so you know you have the right .ini when you scan in DVBviewer.
I actually have my emu in Plugins in the main install folder, not sure if that makes a difference, but like I said, S2emu might not work with DVBviewer without "cheating", but having not used it, I have no specific advice for you. I use Vplug myself. Works perfectly.
Such recording problems can be caused by two things. Signal issues (too strong or too weak) or not enough CPU power. If your FTAs are all fine, the latter sounds like a likely explanation, as softcams do use quite a bit more CPU power. MyTheatre is a bit of a CPU hog itself. Try DVBviewer, and once you've started a recording, go to View->Close Graph to minimise your CPU load. I don't know which emu you're using, but Vplug genereally uses considerably less resources than Yankse/Fenrir.
Yes, it would happen during normal viewing as well, but your specs would certainly suggest it isn't a CPU issue, then. Unless you have other apps like anti-virus or that sort of thing running, which have been known to interfere even on top spec computers. Have you tried tweaking your signal strength? In DVBviewer, if you check the DVBsource while viewing, you will be able to see whether any discontinueties in the signal occur. That way, we can help isolate the problem.
