Controlling Analog rytm from Roland SPD 30

I want to play AR from my Roland SPD 30.
It has 16 pads, including external triggers.
So, I want to play 12 AR sounds from 12 spd pads, and I want to play chromaticly one of 12 AR drums from remaining 4 SPD pads.
How can I do it?

Another case:can I play chromaticly 3 AR sounds?
For example, five SPD pads play sound 1 on AR, five pads-sound 2, and six pads - sound 3?