Thanks for confirming StarThoughts.

I ended up rebuilding my DVDrip again as I noticed the top was slightly cropped. So now I have 1.66:1 video which has been reformatted to work on 16:9. Still can't get the picture quality quite the same as the original DVD. Probably down to the encoder (HC) I'm using in DVD rebuilder. CCE apparently costs $1000 so that's out.

I've sync'd up the PCM track and so far so good! First time I've done this so quite pleased with the result. I'll be able to upload the track at some point if anyone is interested.