I've been making some dvd video compilation discs using dvd decrypter . I put the program in ifo mode and rip just the chapters or tracks that I want from each disc to individual vob files. Problem occurs when I use the Tsunami program to build the dvd. Some of the DVD Music Video Discs are from Promo Only where the audio is 2 channel stereo the others are ETV Music Video DVD's that for some reason are encoded in AC3 audio. The Tsunami program allows me to add the Promo files in stereo 2 channel audio but comes up with an error when i try & add one of the Etv vob files saying that the dolby digital ac3 format is not supported. Any ideas??