If you have a midi file that has a good solo by an instrument like a trumpet sax or even a drum solo, You can put that track in one of the pads.
You must determine what key the solo is in and then transpose the solo to the key of C Major so it can be used with the style you are playing.
Ex. F A C D in the key of F Major would be changed to C E G A.
The rest of the story is in the KN7 manual.
This is a brief outline on the subject, if more help is needed please ask.