Digital BW, The Print

snip 
> A custom CMYK ink setup is required, though I learned this from Dan
> I'm not sure how much is on his site about it. Basically
> a photospectrometer is used to measure the exact color, and dot gain,
> of each of the inks and combinations, then entered
> in Photoshop. One is required for each paper you want to use, the
> differences can be surprising, or not.

Wrote that up once -- but Real World Photoshop (Blatner and Fraser) does a
better job.  Color ink, gray ink makes no difference - same instructions for
all.   My instructions are at
http://www.geocities.com/campfiredan/infoshare/Misc_Quad_info/Set_ink_colors
.html   Provided that the fates (and Geocities) allow you can sometimes get
to that link.  Probably have to cut and paste the URL into the address line
since it is so long the email will chop it into two.  Note I haven't updated
this for Photoshop 6 but it works pretty much the same as PS 5.

> Convert to CMYK using Dan's high bit method. There are several steps
> but you wind up with a 16 bit per channel CMYK file
> with all the original grayscale info in each of the 4 channels.

That High Bit one is at
http://www.geocities.com/campfiredan/infoshare/HiBitQuad/

Dan Culbertson