Dave Smith Instruments SYNTHESIZERS

Hi I'm new to the board so pardon my ignorance!! OK, what I want to 
do is this; I've set up a patch similar to a VCS3 to make synthi-
bubble type noises like Tim Blake/Ozrics. For ultimate tweakability I 
need to be able to access all the parameters of the 4 lfos without 
using the shift button. I was hoping to use a controller for this. I 
have set a patch up in my Nord Modular to act as the controller, i 
know the Evo gets the midi info cos the status led lights up, but I 
don't know how to assign the relevant parameters to the relevant 
knobs on the Nord, any ideas?