I believe I was correct in reading an article on Paul Roark's website about using a quad set in the 2000P
The replacement was
K Black
C DarkGrey
M DarkGrey
LC MedGrey
LM MedGrey
Y LightGrey
From studying a CMYK print-ready image it would seem to me that
C and LC should be DarkGrey and
M and LM should be MedGrey ..
Comments ?
Thanks !
Alex P