just plug em both in. once you have the drivers installed, there's nothing special you have to do. i've set up both my triggerfinger and my usb keybord controller. once they're set up in reason, you're good to go. it let's you pick which controller you want to use. for example if i press the pads on the triggerfinger, it plays the corresponding sounds...if i press the keys on the keyboard, it plays the same sounds.