Newbie Inheritance Question

Hi All,

Can anyone tell me now I might extend an existing record in a parent table
to have values in an inherited table? An example would be a table of all
people (person), and a table of users (usr) that inherits from person. Say
there's an existing record in person, and I want to use that same record
to make them a member of the usr table, as well. Is this possible, other
than by deleting the record from person and re-inserting it into usr?

Thanks,

David

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David Wheeler                                         AIM: dwTheory
David@Wheeler.net                                     ICQ: 15726394
                                                   Yahoo!: dew7e
                                                   Jabber: Theory@jabber.org