[Zope] renaming users

I've been asked to change the usernames of our users from something stand-alone to their email address. Searching the web I didn't find anything related to this. I figure if I can get the password (I am the Admin) then I can at least delete and re-add. Has anyone done this before or does anyone know how to get at this? -- Bryan C. Andregg Duke University Medical Center Programmer Dept. of Anesthesiology e <bryan.andregg@duke.edu> p +1 919 684 6201