IMPORTANT NOTE:  Registered users MUST read!
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  If you are upgrading from a previous registered version of CallBack
  door, DO NOT use the file CBSYS.DAT supplied in this .ZIP!  Doing
  so will return your door to unregistered demo status.

  To receive your new CallBack utilities, contact my board and let
  me know that you need them or fill out the order form requesting
  a mailed upgrade.  There will be a charge of $5.00 per mailed
  upgrade.