Hi there, Diane,
Well, I messed up too. I was thinking it was a folder on a server. I guess I
shouldn't reply to messages at 1AM.
Shared folder would work.
No problem - I'm trying to think in two different languages,
and sometimes neither one comes out right :-o
I really would like to use Mac OS X in English mode, but
unfortunately my Adobe CS4 software is the Japanese localized
version, and it does terrible, ugly things when I switch the OS
to English mode...

(Wonder why they can't take a hint from Omni products,
which work wonderfully even when you switch the OS language.)
That aside, there is one caveat I remembered about placing
the Main Identity in the Shared folder and accessing it
via an alias. Namely, Entourage will automatically create
a new Main Identity folder when you log in with a new
user account that hasn't used Entourage before.
So the solution would require creating the alias and putting
it in place of the second user's Main Identities folder, BEFORE the
second user logs in.
That way, Entourage can find the alias and not attempt to
make a brand new Main Identity folder from scratch. ;-)
Jeff