scrollHorizontally extension --> change keyboard control behavior

Hello,
scrollHorizontally extension works fine with mouse scroll wheel because it only have one direction.
When I reached a section with slides, it moves you across the slides till the end before continue to the next section

I want to repeat the same behavior with the keyboard,
change sections and slides only with the down/up arrow key
and suppress the left/right keys

I already try $.fn.fullpage.setKeyboardScrolling to stop going down
now I need the down key sent me to the left :P

is there a way to do that?

ex: http://azulprado.com/muestras/fidalisis5/#inicio