External sub and sound

Hi,

May I select external subtitle and sound file for movies?

I have a mkv movie. For sound, .dts and .ac3 extensions are not worked.

For subtitle, rar with .idx and .sub is not worked, too. Filenames are the same as the movie file.

Thank you very much…

External Subs work: but not *.rar !

Audio: don’t know, but try to use OPTION-button and select audiosource