Digital BW, The Print

I've just recently begun to experiment with using Ultratones on my 
Epson 1200 under W2K and PS 7.  I was previously using MIS FSN and 
the Epson driver.  I've been generally very happy on my first round 
of tests with these inks.  The ramp is smooth and the highlights and 
shadows seem to have good separation (although still not quite as 
good as the piezo software w/ the PT inks).  Maybe I need to tweak to 
reach perfection...

However, I've been finding the `cool' curve a bit to purple for my 
taste (not really a selenium look).  However, maybe it is supposed to 
be this way? The neutral seems to be pretty much right on, and the 
warm curves are great.  I guess my question is how do I adjust the 
curves to tweak them to my preference?  Is there anything written 
anywhere that explains this?  Also, has anyone in the group enhanced 
the curves for the 1200 / PC platform using the new Ultratones and 
would be willing to share them with me?

One last question, if I create a new curve layer for adjusting the 
image, will it throw the color balance off?  If not, should I do this 
before converting to RGB, or after?

Thanks,
Mark