Digital BW, The Print

>I  have spent weeks trying to get a decent black and white print 
and am
tearing
> what little hair I have left out of my head in the process.
>
> I am a professional photographer trying to make large prints 
with the
Epson
> 7000 on a Mac using MIS VM inks.  I am getting terrible 
posterization
using
> Paul Roark's curves (any of them) and muddy yuck without 
them.  Paul
Roark's
> Workflow hasn't been extended to the Epson 7000 on a Mac, 
but I feel sure
> someone out there is using this combination.
>
> I did a swab test of the the six cartridges, thinking I had an ink
problem,
> which was Paul Roark's opinion, but Bob at MIS said that the 
ink pattern
was
> correct.    I would appreciate any specific advise you could give 
me or
> direct me to someone who is using VM inks on a 7000 on a 
Mac.  I believe
> I've tried just about every combination of color 
space/paper/mode, etc. I
> understand a little about profiling, but do not know how that 
applies to
> hextone inks like the VM's.
>
> Is it time to go to inkjetmall or can MIS' inks work with my 
system.
>
> Again, sorry for taking your time with this.  I am really quite at 
my
wit's
> end.
>