This post is to help users unlock all of the available portraits and soundsets for usage in Neverwinter Nights.
The game doesn't intend to allow you to use Singleplayer NPC voicesets because they figure this would be immersion breaking, sadly they didn't have the foresight to figure that in multiplayer no such restriction need apply.
To unlock all of your portraits and soundsets download the file below and place it's contents in your "/override" folder in your NWN installation directory.
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