Using the CMF to create new roles.

[Braun Brelin]

Hello,

I'm trying to create a new application with Zope and CMF.  
I notice that when I create users using the acl_user folder,
the roles that are defined are "Manager", "Member", "Owner"
and "Reviewer". 

I'm trying to change and/or expand the roles.  For instance, 
I'd like roles like the following:

Administrator
Librarian
Reviewer
User

etc. etc. etc. 

I don't see an obvious way to do this.  Can someone help me out?
I'm using CMF-1.3 and Zope 2.5.1 on a Linux RedHat 7.3 x86 box.

Thanks,

Braun Brelin
bbrelin at yahoo.com