Technical questions for the MPC2000xl and the MPC2000
By scsicardreaders.com Thu Jun 16, 2011 2:39 am
I'd save it out as a Standard MIDI File and then import that into the GarageBand program. I'm sure it can import SMFs and that would be the fastest, easiest way to do it.

:P Or if you want to be more low-tech, hook the MIDI out of the XL into the MIDI IN of your GarageBand platform (PC?), hit record on GarageBand, then hit play on the MPC.