Sorry, I misunderstood your question.
** I thought those 2 sections would work differently. **
No, adding an event is adding an event.
You can however allow "anonymous" users to add events too by just changing the "anonymous" user's permissions. It may also be possible to modify that plug-in to allow anyone to add a birthday regardless of whether they're allowed to add a 'real' event or not. That would take some customizing though.
Dan O.
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[This message has been edited by DanO (edited March 22, 2004).]