I'm not quite sure about the official way to make this work, perhaps
somebody else could help out in this respect.

For now I'll simply email you a zip that you can extract into your
Forrest skin-folder. If that doesn't work let me know ...

Btw. afaict it was just decided to merge current scales
functionalities back into pelt in some not so distant future.
 

Regards,
Ferdinand Soethe