Digital BW, The Print

Hello, I have been playing with my UT inks and 1280 printer.  I have 
had mixed results using EEM and the roark curves as I was expecting 
WYSIWYG and I find my prints either muddy or blocky.  I finally spent 
the time to print some stepwedges with the 4 curves.  I was a bit 
surprised to see the output was not a smooth progression on the dark 
side (see link below to the wedges from top to bottom warm, cool, 
neutral and M warm).  I think in several cases I need to adjust the 
output to flow more consistently but I have no idea how to influence 
specific points on the scale.  Can anyone point me to the right set 
of controls and I can play with the output?  Should I be editing the 
specific curves?  Any help would be greatly appreciated 
Thanks
Brian

http://f1.pg.photos.yahoo.com/ph/bmg5/detail?.dir=/a5be&.dnm=b19e.jpg