Digital BW, The Print

Hello all. I'm new to the list and looking for some help locating 
some workflow options. I have an 1160, Peizo system and have 
tested MIS, old Piezo and new Piezotones. I'm getting fairly good, 
but somewhat variable results using the Peizo driver (depending 
on the mood of my printer and the ink in it).

So my question is where can I find workflows that would allow 
me to test the Epson driver with quad inks when I run into trouble 
with the Piezo driver? I've heard people refer to DeWoolf and 
Randall workflows/curves.

Any help is greatly appreciated. Thanks.