How can I disable RWW Permsions for Demo user account

Should be able to control this using the following group policy:
Computer configuration | Administrative Templates | Windows Components | Terminal services | Client/Server data redirection | Do not allow drive redirection

You my friend have some work to do..  make sure the directories do not have EVERYBODY on share access and on the file security make sure the demo account does not have access directly to folders or files.   Rob has a good suggestion, but if you are only worried about outside problems, that is fine.  Me I look at the whole picture and ask who needs access to what.  Sure it creates more work but it is a prudent practice, escpecially in SBS 2003, since the networks are generally "small", so why not do it?  

Make sure you understand share permissions and file permissions before embarking on this quest.  It is not difficult to do, but requires understanding.

cheers,

Brian

ALL my security is group based.  rob your suggestion looks like it will work for ALL users but I only need to prevent the Demo User.

Afraid I can't give you the specifics, I have never worked with it, but you can filter it for specific users using what is called "loopback processing" within the GPO. It is specifically for that.  Perhaps someone else can "fill in the blanks".

Thanks gordonmann.
Cheers !
--Rob