i used all 4 files yes, and restarted GUI. And yes problem is with DVD
I tries PAL versions and also a few with custom subs.

When i stream PAL versions though, and menu from the dvd pops up, how do i choose "play" on the dreambox, without any mouse or keyboard attached to the dreambox?

perhaps if i have the same version af vlc for dreambox as you, the problem is solved?

I am using VLC 1.11

Problem must be there in VLCServer and your setting:

if re.match("dvd", filename):
# sout-all only, if is not selected subtitle track or subtitle language
if self.gettypeSubtitles()=="---" or self.gettypeSubtitles()=="-1": 
parameters += " :sout-all"
else:
parameters += " :sout-all"

See on it: parameter " :sout-all" add into stream all subtitles in same time.
I think, you:
1) you streaming grabed DVD
2) you leave set subtitles as none or as -1

Try comment this whole test:

#if re.match("dvd", filename):
# sout-all only, if is not selected subtitle track or subtitle language
  # if self.gettypeSubtitles()=="---" or self.gettypeSubtitles()=="-1": 
  #  parameters += " :sout-all"
#else:
  #  parameters += " :sout-all"

save and restart gui and let me know.
But in this cases will not be streaming more audio track.

VLC does not know streaming all audio tracks and one selected subtitle track, but only selected audio and selected track or all tracks ( :sout-all )

may be, for testing will be more easy change only lines: parameters += " :sout-all" to parameters += ""