DJ Techtools made this cool mapping for Traktor that will put all the controlls that you need on the deck controls of Traktor Kontrol S2 and the Traktor Kontrol S4.
Take a look at this video to learn how to use it:
Read more here
Get the mappings
|Optional FX/Filter unit|
|Front view: Cross fader and monitor control|
|Click the image to see a full overview of the connectors.|
|Looks busy, but it's actually pretty well organized!|