[David Rokeby]

Thanks for this info. I upgraded to the new release of Toast 10 (10.0.1), and had problems making this work. I kept getting an error -50 at the end of the multiplexing, whether burning a disk or creating a disk image. In the end I accidentally dragged the m2v file into Toast 10. It linked up with the Dolby Digital audio of the same name in the folder, and burned fine without re-encoding. I am not set up to verify the audio quality, but the visual results seem very good. I am not sure if this reflects a bug fix in Toast 10 or not, but I am a happy camper either way.