Hi Ed,
Yes you do need a set of hardware defines such as
MClk VAR PortC.1
SClk VAR PortC.4

MClk in my design is driven by CCP2 so it cannot be randomly assigned but any of the other Intersema pins can be attached to any PIC pins.

YOU, and only you, can write the hardware defines as they are dependent on how you have laid out your circuit board.

Or have I missed your question?

HTH
BrianT