assign different Midi CC for one instrument

Hi all,



I'm using EWQL Symphonic Choirs and for some of the patches, it seems like velocity crossfading is not an option.



So, I'd like to set up the modwheel to control Volume instead of Velocity in Protools. But only for the one particular instrument. I can't find a way to select "learn MIDI cc" so there must be some place to assign this manually?



Thanks so much,