Digital BW, The Print

Forgive me folks, as I don't have the Piezo software I don't have
instructions for setting up custom dot gain curves, but I'd like to learn
more about them to see how they might benefit my workflow (presently MIS
VM). I looked for info about it on inkjetmall's site but I couldn't find it.
If it isn't a violation of some sort would someone be willing to email me
the directions for setting up the gain curves from your piezo instruction
set?

Why are custom dot gain curves necessary for Piezo? I am of the impression
that profiles should make dot gain curves unnecessary. Is that right? Isn't
the idea that you are supposed to calibrate your monitor to a particular
standard, and your printer/paper/ink gets profiled to a different standard,
and when both of these devices are each properly calibrated and profiled to
their own standard, the net result is a good match? Thus, where does the
custom dot gain fit in-- is it meant to be in lieu of a properly
calibrated/profiled monitor, or is it only intended as a stop gap measure
for papers for which you do not have a profile?

Thanks 
Todd