QTR-Quadtone RIP

I'm creating some curves for UT7 and a 2200 printer.  I just
characterized the inks and will calibrate ink density.  Looking at the
ink pattern page it's hard to tell which are the gray inks.  The .qidf
file for EEnhMatte-cool uses black, magenta and light magenta.  Does
that mean it uses only black and then M and LM for cooling it down? 
Do I figure densities for M against K and LM against M?  It looks like
the existing curve did that.  Which positions are black?  It looks
like K, C, LC and LK.  Is that right?  If I wanted to create a neutral
curve I would figure densities for these four inks right?  It was a
lot easier when I was using the UC inks with just two blacks.

Thanks,

Tom