What up? I suggest that when you get your midi problems worked out with the XP60 that you consider the Roland expansion cards. Can't the 60 hold 2 or 4 or something like that? It'll be a lot less of a learning curve than a new module i'd think. Cheaper and less connection problems in the end.
Do you have a zip drive and the full 32mb memory in your MPC?
I have found that having fulling loaded equipment and a good understanding of how the stuffworks is 10 times better than having a lot o stuff.