"Solving audio sync problems is not as difficult as you might think, even if you can't rely on DGIndex to report the correct delay. Mux your video and audio together with a zero delay, play the output VOB file in Media Player Classic. This player gives you the option to alter the delay during playback, so it's easily adjusted to find the correct value."

If you can find the correct value (I assume it gives the millisecond delay), then you can compile it in DVDLab, which lets you set the appropriate delay to whatever you want. Makes it really easy to correct sync well after the audio and video streams have been generated.