there's one thing you can do to fix the sound problem on disc 2.
take disc 2 of the boot called "naked" (alcyon), convert it into a wav file. Then, use a program such as TMPGEnc (not free, sorry) and then choose the wav file for the audio part.
It's a bit long to do, but I've done it so you can do it too !
C'mon, be brave !