Digital BW, The Print

I have an Epson Stylus Photo 780, and I'm trying to get started 
printing with the MIS sixtone inks.

I just got the MIS Full Spectrum inks for the Epson 780 / 785 / 870 / 
875 / 890 from MIS. However, I cannot find any workflow or curves to 
use with the 780 and these inks.  The few prints I've tried look 
terrible, because I don't have the right curves. (It prints just 
fine, but the values are all screwed up.)

The MIS site's "workflow" page (http://www.inksupply.com/index.cfm?
source=html/workflow.html) only has a few donated workflows and 
curves for some specific (and high end) printers. Why would MIS sell 
a sixtone cartridge for a the 780, if there's no apparent way to get 
it to work?

An older post to this group mentioned that the MIS full spectrum inks 
were designed for the piezography drivers, but the MIS site says 
nothing about this.  I can't tell if the 780 will work with the 
piezography system, and it looks to me that if you want to buy the 
piezo system, you have to buy it with different inks anyway. Is any 
of this true?

I'm totally baffled and frustrated, not to mention stopped in my 
tracks.

-- Can the Full spectrum inks work with the 780 or did I buy the 
wrong product? 
-- Where can I get a workflow and curves for the 780 with these inks? 
(or at least more information, or something similar that I can 
tweak.) 

Advice, pointers to other resources, anything would be helpful.
I'm running Windows 2000, and I would like to use Somerset Velvet 
and/or Epson Archival Matt papers.

Thanks,
--Robin