Problems installing Zope/Plone

[jennyw <jennyw@dangerousideas.com>]

I'm using testing. I tried installing plone, which installed zope. But 
zope isn't happy.  The README.Debian file says there should be a file 
called default in /usr/lib/zope. But there it's not there. Also, when I 
try to start Zope (zopectl start), it gives this error:

Starting Zope instance default...
 failed: missing required path(/var/lib/zope/cgi-bin/default)
 Waiting instances in late: done.
default: start: missing required path(/var/lib/zope/cgi-bin/default)

Any ideas where I get this file or how to generate it?

Thanks in advance for any pointers!

Jen