Sound module and Midi keyboard hook up?

Okay i would really appreciate if someone can help me. I just got a roland xv 5050 sound module with the roland pc 300 midi keyboard. How do i hook all this up to the mpc. I also got a mixer too which i heard that i would need it.

I think it's best to check out the midi tutorial on this site. I can't explain it any better than the tutor does.
Make sure you plug the keyboards usb cable into a computer, or you won't have any power. There should be a little switch on the back of your keyboard that reads "usb/midi" or something. Switch that to midi.

Hook up the midicables as described in the tutorial, and you're set.