[Zope] SQL authentication

I'm trying to implement a SQL-based login. It looks more difficult than I anticipated. Here's what I need: - Zope based web system where anonymous users can register. - Registered users should be able to login using a web form. - A free webmail system using the IMP. IMP is PHP-based, so I guess I must use SQL for my user list in order to share user info among Zope and IMP. LoginManager is unfinished, documentation is too sparse. Also it was last released more than a year ago, so I'm not sure whether it's being developed. GUF has good docs but I have problems implementing it. I'm looking for the easiest solution. Something that is well documented, including examples. -- Milos Prudek