UPDATE:

Video

conversion to lossless is ready - when audio will be finished I'll convert it to AVC at the highest possible bitrate to fit a BD-25; I've watched some scenes and colors are good to excellent, except the part where the spaceship could be seen; they are few seconds, and even the HD-DVD colors were not so good, so I decided to leave it as is, for color continuity.

Audio

the following soundtracks are ready and in sync:

LD PAL PCM english 2.0
DVD PAL AC3 english 5.1
DVD PAL AC3 italian 2.0
DVD PAL AC3 french 2.0
DVD PAL AC3 spanish 1.0
DVD PAL AC3 commentary 1.0
HD-DVD english DD 5.1 (from DD+ core)

the following soundtracks must be syncronized:

LD NTSC PCM english 2.0 from 1990 (must check if it's different from PAL)
LD NTSC PCM english 2.0 from 1998 Signature Collection

eventual isolated score must be made.

if french PCM soundtrack will be available in the next few days, I'll add it too.

Subtitles

they still must be found - I should find the same language of the soundtracks; help is appreciated.