enabling more than one theme?

[joakim]

I want to enable one base theme and another smaller theme.

It seems you are supposed to be able to do it with enable theme but I'm
having difficulties:

ELISP> custom-enabled-themes
(tsdh-dark)

ELISP> (enable-theme 'zen-2)
nil
ELISP> custom-enabled-themes
(tsdh-dark)


tsdh is enabled by custom and I want to enable or disable the zen themes
with code.

I'm not sure if its a bug because in the custom theme view you set the
ability to enable more than one theme. How is it supposed to work?

-- 
Joakim Verona