Digital BW, The Print

Anyone with experience with Gimp-Print on a Mac? In particular, does 
it allow control over individual inks in ways that would facilitate 
adapting it to quad or hex-black printing? It seems to allow CMYK 
adjustment by sliders, and ink density control too. I have a 7000 and 
am looking for cost effective RIP/Driver.

-Bruce
-- 
Bruce C. Kinch
Associate Professor of Photography
The Art Institute of Boston at Lesley University