Package README (CVS ver. 1.1.1.1)

plone.org had about 9000 users registered.  We could no
longer use the original AccessControl.User.UserFolder
default implementation.  Here is a BTreeUserFolder
backed implementation.

How to use?
create an external method in the folder you want to
replace the acl_users objet in.  and it would look like:

from Products.BTreeUserFolder import BTreeUserFolder

def migrate(self):
    BTreeUserFolder.manage_addUserFolder(self, migrate=1)
    return 'fin.'

thanks to kapil for shedding a tear.