QTR-Quadtone RIP

I have a Epson R2880.

I'm looking for a way to switch the ink cartridge locations, while retaining the set of Ultrachrome K3 inks.

In particular, I need to switch the main black with the Cyan, but I've no idea how to do this.

Hardware-wise, I'm retaining the cyan cartridge in its normal location, but I need to fill it with the MK black ink, and tell the printer and/or driver that it should look THERE for the MK ink, and not where it normally looks in the "K" slot.

This is possible as I'm using a CIS, and need to retain the 3K setup, but I want to set up two alternative profiles where one of them looks to the cyan cartridge for the MK, and the other one uses the standard Epson driver to find the PK ink in the standard "K" slot.

Can someone tell me which files I have to edit, and preferably how?

I hope not to have to reprofile as I'll still be using the same inks on the same paper - just moving the location.

many thanks and kind regards
Guy