OE cannot be set up to use shared fodders.

It can't be done natively with MS Outlook Express. It can be done with a
local IMAP server. I use Mercury/32:

http://www.pmail.com/overviews/ovw_mercury.htm

As a minimum, you would set up the "Mercury Distributing POP3 Client", and
the "Mercury IMAP4 Server". Set this up on the computer which will be
always on. Set up an IMAP account in MS Outlook Express on each computer.
Don't execute a POP3 fetch with either installation of MSOE; let Mercury/32
handle the POP3 fetch; it will put the email messages in a central file
location which each MSOE client can then access.

As others have said, there's no way to share Outlook Express storage
between two computers.

To view and store future incoming E-mail messages on both computers:

1. Set up the same E-mail account on each computer.

2. Configure the account to leave a copy of messages on the server.
In Outlook Express, that setting is in the Advanced tab of the
account's properties.

3. Choose one of the "Remove" options to prevent messages from staying
on the server indefinitely.

If you upgraded to OE6 on WinME, you could copy existing OE folders
from one computer to the other and import the messages that the
folders contain.  Unfortunately, it's a very complicated process.  To
get an idea of  what's involved, go to http://www.insideoe.com and
browse through the FAQs (Frequently Asked Questions).

Please reply to this message (in the news group, not by E-mail) and
tell me if you'd like more details.  If so, I'll post them in a future
reply.