[Zope] Product for user registration?

[Robb Shecter]

Hi,

Anybody recommend a product or system that for users to register themselves in 
a Zope site?  Basically, I want to have the functionality of the Plone 
registration process, but I don't need the whole Plone system.

I'm guessing that I'm going about this the right way; I want to do 
light-weight user-membership types of things - customized preferences, saved 
searches, opt-in mailing lists, etc.  The Zope user model looks perfectly 
adequate to build on to make these - no reason to use Plone, and then have to 
dismantle and not use most of it.  And so, I'm wondering if there's a 
stand-alone package for users to register and eventually cause an entry in a 
user folder to be created.

Thanks,
Robb