I'd like to take advantage of Zope's ability to have separate
acl_user folders in sub folders to manage security in Plone 2.0 RC2.

I'ved tried adding acl_users in a sub folder but Plone doesn't seem to
recognize the users.

Anyone have any ideas on if and how this can work?

Does anyone know of a good solution to give certain users full access
to some folders but no access to others without creating a large
administrative burden?