@pentiac
At the base of the initial post of this thread there are instructions how to unlock and add these premium voices.

Edit:

When i wrote "this thread" that's literally what i meant, the initial post in here. Link: [Only registered and activated users can see links. ]

The instructions are in a quoted link at the base there, which is this specific post, here: [Only registered and activated users can see links. ] (Post #35).