I can take the Decoder-ripped AC3 file, and then open it in BeSweet. From BeSweet I can then export as a WAV file (which opens just fine in Audacity, but I'm not trying to use Audacity). If I try to open this WAV file in GoldWave, it says "Internal file size is incorrect. The file may be corrupt. Open anyway?" If I click "Yes" then the next thing GoldWave tells me is "Cannot determine format of file: VTS_03_1 - 0x80 - Audio - AC3 - 6ch - 48kHz - DRC - English - Please specify a format below." It gives me the option to choose a File type: either "Raw (snd, raw)" or "Dialogic (vox)" and I get to choose the Attributes from a list of about 600 things, and then I get to choose the Rate (Hz) which I'm pretty sure should be 48000.
So am I supposed to use BeSweet to convert from AC3 to WAV, and then use Audacity to reduce the WAV file down from 6ch to stereo before I try opening the file in Goldwave?