These are basic mappings only for the Pioneer DDJ-REV1 [Without additional controllers or anything else]. Simply import and further customize your individual things (If wanted or needed).

  Unpack the Downloaded Zip-File, if Done open Traktor and:

 Go to  ->  Menu\Controller Manager\Add\Import from Disk...

 now open the File : "Pioneer DDJ-REV1.tsi" You're DONE!

...for potential beginners/first-time users: I normally wanted to include the audio settings (i.e., import settings and then the DDJ-   REV1 default audio outs and controller mappings in the file). However, I decided against it because many users use software ASIO drivers (Asio4All), and thus it should be up to each individual whether they want to use the DDJ-REV1 WASAPI or DDJ-REV1 with ASIO-emulated drivers, assuming "latency" still plays a role these days...