For info for all potential hidden audio files digger...
ALl audio files are in folder \StreamVoice of your Kotor2 installation folder.
You don't need any converter tool, just copy the file you want to listen to some place else ( to avoid breaking your game ;-) and replace the exension '.wav' by '.mp3' YOu can then directly listen to them using, for instance Winamp (Windows media player does not work for me, cant say why).
BTW you can do the same for KOTOR and you can also get all the music from StreamMusic folder (thought KOTOR music is much better than KOTOR2 ;-)