Digital BW, The Print

I am trying a new direction in my photography and am wondering what 
some of the better ways of creating digital "grain" are.

Here are my sepcifics:

shooting with D200, ususally ISO 100 or 200, mostly landscapes and urban
PS CS2
R2400 (K3, papers: VFA and Museo PR), R2200 (K7, Hahnemuehle Museum 
Etching)

I used to shoot Iflord Delta 3200 a few years ago when I was using an 
FM2 or a FM3a and liked the results. I have tried using the "add noise" 
function in PS but am rather confused as to the differences between 
normal and Gaussian and was unable to produce something I liked. I also 
tried using the ISO 400 setting on a Fred Mirando BWPRO PS add-in I 
have, but I want more grain than it can produce.

Any suggestions? I am unsure whether I should shoot at ISO 1600 in the 
camera or create grain using other methods in Photoshop. Also, does one 
sharpen before or after adding grain?

Thank you.