Sharing wihout authentication challenge

I have a mix of PC's. some are win 7 and some are XP set up in domain running server 2003.
One of the pc's is NOT in the domain and it is in its own work group.

It has one shared folder on that pc that has read only access for everyone.
All the pc's are able to map to the shared folder and access it ONLY if they use that pc's user ID and PW.

The problem comes into play when rebooting a pc. Xp stores the entered login info but Win7 does not. So I am forever being asked to come log them back in. Im tired of it. I can not add each user to that pc as it is not part of the domain. And I can not move it to the domain.

So can anyone help me figure out how to get win 7 to reconnect after reboot without prompting to be authenticated?

All ideas are welcome.
Thanks
-Eds

Yes I did it does not work

Have you tried a logon script? You can search the net for exactly how to do this but an example would be:

In notepad -

@echo off

net use Z: \\SERVER\Share /user:XXX PASSWORD /persistent:no

Change XXX and PASSWORD for your desired user name combo and as you mentioned domain then add DOMAIN\XXX before the username but after the colon. :)

Save this as Drive.bat (making sure you change the saved file type to All File Types)

Once you've saved this somewhere you can copy it into Win 7 Startup folder.

Start Menu>All Progs>Startup (right click and select Open for All Users and paste the .bat file into there)

To test the script just double click it like a normal program

Creating logon scripts is trial and error if you are new to them especially as working out why they haven't worked is tricky.

If you get stuck search the net!

Hope this helps!