Updates:
the Cinema DTS track is slightly out of sync compared to the HD-DVD tracks; plus, its phase is inverted (also in comparison to BD); so, I managed to fix these things.
Plus, the french, german, italian and spanish tracks from the HD-DVD have an empty .1 channel; I extracted it from the DTS track, and replaced the empty one for each language with this.
I'm going to capture the PCM laserdisc track now, unless someone thinks that the analog track is better and/or different from the PCM one...