The set-up program will copy all the required files to
your hard drive.  It will prompt you for a directory name.
It will also create a cc:Mail group window and two icons,
representing two cc:Mail users.  Double-clicking on either
one of these icons will launch you into the mailbox of a 
user in the demo post office.  You can send mail between 
the two users and to others in the demo directory.
