Thanks for the info. Trailer was a bonus, and I put it in the disc at the last minute; it will play right after the credits, as a "gift" to whom has waited until the very end... (^^,)

As MultiAVCHD allow only 6 soundtracks and 5 subtitles (+ no sub option), is it possible to select the other soundtracks/commentaries only directly during the vision of the movie... I tried to add more than 6 soundtracks in the menu, without luck. If someone is aware of a trick to do it, please let me know.

About 4.1 profile: don't know if it could be the problem, but into my two PS3 (different models) it works flawlessy - chapters, ff, rw etc. - if you have a spare BD-R to "sacrifice", you could try to use TSmuxer or another software to change each file's profile from 4.1 to 4.0, burn again and see if it works or not.

And, thanks for your positive feedback: an "old, bad, low bitrate MPEG-2" (^^,) turned out to be really good as video source for this project!