This should be very simple. Follow the above tutorial, and create a cmd.txt file that will be looking like:
  • open ftp.host.com
    username
    password
    cd folder
    get file.ext c:\save\to\file.ext
    quit
To know the switches of ftp.exe, open a DOS window and type ftp -? in the command line. When you're inside the program, you can type ? to view a list of commands you can use.