The regular mixer part is mapped as the regular one in traktor (Eq's, volume fader...) The gain knob is set to a filter, then moving to the center part, bank a is used to control the fx assignation, bank B is the looping section, and bank D is for navigating through your track collection and loading songs to the deck you want.
but the best is to try it! Some of the buttons aren't already mapped, I left them unused to give you the possibility to map some custom extra control.
Hope you'll enjoy it!