Kontakt 4/5 assigning footpedal

hi all. I'm using sonar 8.5 producer. Anyone know how to assign a footpedal(sustain pedal ) to the pitch bend and modulation on kontakt 4 /5 's keyboard?? I'd like to use my sustain pedal that i have on my keyboard to use them as i don't have a pitch/modulation on my keyboard. Thanks /ray