I’ve found this thread in Doom9’s forum (http://forum.doom9.org/showthread.php?threadid=47476).
A guy (Yuent4844) proposes this:
rip dvd9 all files to a direct (eg :\A1)
run dvd95copy trial ,input select :\A1, output makes :\A2
trial can produce all menu+extra(takes max compression) and
only 10 min main movies,a really lucky restriction,it means that
trial only run more a bit than 10 min.then delete the only .vob
run dvd2one 1.0.2 ,input :\A1, output makes :\A3,set
amount=4472-amount in :\A2,
then move all.vobs into :\A2 and rename the same names with the main movies
run ifoupdate update
5.gain a dvd with max compression of menu+extra and good amount main movie.
Anyone with some experience can comment on this?