Cubase 5: changing tracks live?

Hello, I would like to organize a setup of different vsts to play live in Cubase5. I need to change tracks to quickly access the desired sound throughout the live gig, so what are my options for doing this from my midi controller?

Im using a Kawai mp6, Im partially open to external gear like pedals or small boards (as long as they´re not expensive) but preferably I would like to just make it work with just the controller, and not using the laptop´s keyboard arrows…
Thanks in advanced, Ill be waiting for your suggestions :smiley: