Function:   AppendThere()

               Reports whether DOS' APPEND.COM has been installed.
               Then one can use AppendPath() to inspect APPEND's PATH.
               This feature only works for DOS versions higher than
               DOS 3.30 if I'm well informed.

   Syntax:     AppendThere()

   Arguments:  None

   Returns:    A logical, true if APPEND is installed.

   Usage:      if !AppendThere()
                    ? 'Hey Dumbo, where can I look for those bloody'
                    ? 'files I currently cannot find?'
               Endif