In order to install and run SoundDesign (Heinz Daeppen) projects on your MX640 or MX642 decoders you need to purchase the loading code. If you have the Decoder programmer and are upgrading/installing the sounds yourself on an existing decoder then you need to provide us with the serial number of your decoder in the comment field.
In order to retrieve the serial number you need to read CV 250 to 253 = serial number (e.g. 188.8.131.52) and when you receive the loading code (e.g. 184.108.40.206) you write this code to CV 260-263 .