Normally, people set up Mapped Keys with the keys that they want to broadcast, but if you want only the entire keyboard to broadcast, then you can make a copy of your existing Activate Repeat Mapped Key under Always On, and then remove/adjust the Actions for the mouse under each of the steps.
Hmm I dont knwo how to, I'm really confused about the keymapping system in ISBoxer, maybe to much information at once ... Would be great if u could do a step to step explenation - only if its able to disable it with a special key - dont want permanent no mouse recording!