QTR-Quadtone RIP

I posted this before and searched for an answer somone gave me and just 
can't find it in the archives. My question was how to print on luster 
paper with tje 3MK inks and asked if I could switch out the MK with the 
OEM PK so I can print color and BW on luster papers. 

  I think the answer said I could switch out  the MK inks with the PK 
OEM ink when I wanted to use a luster paper for black and white and 
color. But I Cant find the answer in the archives...Paul Roark gave it 
to me I think.
Any help will be apprciated. I just don't like the look of the color on 
the matte paper. BW is fine most of the time, but not all
thanks
Frank