Digital BW, The Print

hi,

I have question that's not directly related to that subject, but the title fits, so what the hell, maybe somebody will be able to help me out.
I have an issue with Monaco and B&W prints. I can manage a pretty decent B&W on matte papers (I used to think it's great, but then I saw K7 inkset can do and things changed a bit ;). anyway, when I try to do B&W on glossy papers, it always comes out a little greenish for my taste. I usually print patches from colorport (2989) and I noticed that there aren't that many neutral greys in the layout. that is when I got the idea to maybe make custom patches, designed specifically to profile for B&W. only thing stopping me is the fact that I haven't got a clue how to go about this. anyone can point me in the right direction?

thanks,
m.