[Zope] What is the Best Way to Include CSS Stylesheets in Zope

[zvi@12thplanetcafe.com]

I would like for all of my Zope pages to use a CSS
stylesheet by default. Ideally I would be able to keep
the reference to the stylesheet in only one place in
Zope and have changes to the stylesheet filename
propagate globally.

The Beehive book does not mention anything about how to
integrate CSS stylesheets into Zope. Does anyone what
is the best way to do so?