I played this game many years ago an I distinctly remembered a narrator and other voices livening up the world the GOG release didn't have these.

I checked the config files and from line 45 to 115 "include_sfx.ini" points to the "Sprache" folder but as this is the English version it should point to "sprache_english".

After replacing all occurances of "Sprache" with "sprache_english" ("Addon" with "addon" just incase it was case sensitive) I had the audio I remembered back, I hope this helps someone else enjoy this underrated game a little more.