Digital BW, The Print

I'm about to buy a new printer and am considering the R1800.  In an
ideal world I'd like to use the same printer for B&W and color.  I've
seen rave reviews of the R1800's color output, but have also read that
it isn't great for B&W printing on matte paper.

I've been using a low-end Canon for color printing (unsatisfactory)
and an Epson r220 with MIS inks for B&W (great results, but I'd like
bigger prints).  I came here to do some research and saw a post about
an approach designed by Paul Roark which would allow me to use the
R1800 for B&@ and color without swapping inks.  This would be fantastic.

Could someone explain the approach and/or point me to where I can
learn more about it?

Thanks.