EXS 24 Logic Sampler Users Group

I would like to assign different region on my keyboard for different 
audio-instruments.
Like that: 
From c1 to b1: 1st audio-instrument
From c2 to b2: 2nd audio-instrument
From c3 to b4: 3rd audio-instrument etc...
And after trying several ways in the environment, without success,
I ask you for some help.

It would me so helpful for me .
Thanck you

fanchy35@...