If the command isn't visible in the keyboard config dialog, the chances are it just doesn't exist, so you won't be able to make it work just by hacking the file. The meaning of each number in the file vaguely given at the top of the .mkb. The bit after the // is just a comment, doesn't impact the functionality of the app.
Do you really need so many notes accessible at the same time? Remember you need to keep some keys spare for other commands.