This is ported to audacious from the XMMS-Green version, the green version didn't suit my desktop so I made a blue version and then a red version. The changes I made are as follows; changed colors, changed text from XMMS to audacious.
To install the theme try the following options (they all assume that you have cded to the same directory as the theme archive...);
cp audacious*.zip ~/.xmms/Skins
if that doesn't work;
mkdir ~/.xmms ; mkdir ~/.xmms/Skins ; cp audacious*.zip ~/.xmms/Skins
that last one should work but if not then;
sudo "cp audacious*.zip /usr/share/audacious/Skins/"