Having thought about my question, I think I have managed to figure it out.
Just to return to your reply earlier on about the warm greys..
I am looking at the EnhancedMatte Neutral Descriptor file and I am guessing that these lines are referring to what coloured inks are been used.
So in the case of Enhanced Matte Neutral, we are still using, Cyan,Light Cyan,Magenta,Light Magenta
Have I got this right ?
UCmk-EEnhMatte-neut
#
# Toner Partition Information
#
N_OF_TONER_PARTS=2
TONER_INK_1=C
TONER_VAL_1=100
TONER_INK_2=LC
TONER_VAL_2=30
N_OF_TONER_2_PARTS=2
TONER_2_INK_1=M
TONER_2_VAL_1=100
TONER_2_INK_2=LM
TONER_2_VAL_2=25