[Zope] Replacing /acl_users with LDAPAdapter

Hey all, I *know* I just saw this very recently, perhaps even on this list, but now I can't find the article (mini-HOWTO, README, or other) and I thought maybe someone has a link?? The text described a way to replace the root acl_users with another UserFolder (in my case an LDAPAdapter). Anyone have any ideas where I can find it? Thanks in advance, John -- John Ziniti Channing Laboratory Brigham and Women's Hospital 181 Longwood Avenue Brookline, MA 02115 john.ziniti@channing.harvard.edu