EXS 24 Logic Sampler Users Group

Does anyone know how to do what I'd the EXS24mkII to do?

I want to have a sampled Violins patch consisting of:

PP, MF, and FF long samples, that are velocity switched and velocity 
crossfaded.

AND, 

I want it to when I apply MOD WHEEL (CTRL#1), the whole keyboard 
switches to:

Tremelo Violins. PP, MF, FF, that are also velocity switched and velocity 
crossfaded.

I would even settle for all of the above without Velocity crossfading. Does 
anyone have an idea how to do this?

I have a feeling it'll have something to do with Zones, Groups, and Sample 
Select.

Thanks,
Evan Evans
Film Composer