How to install theme

[R Kimber]

Does anyone know how to install the Osliner Radience Extended theme?  There
don't seem to be any instructions on the download page:

http://nordlicht.deviantart.com/art/Radiance-Osliner-Extended-162053933

I'm also interested in the "extra-community-themes", but the instructions
for downloading don't work and seem to require special privileges
http://linux-update.blogspot.co.uk/2010/04/install-extra-ubuntu-community-themes.html

- Richard.
-- 
Richard Kimber