Digital BW, The Print

I think I asked this question before but can't find the answer. I've a
good working 4000 Pro that is about out of ink. I've been trying,
without much luck, to get neutral black and white prints from it using
QTR on my G5. I get much better results (or I'm just mis-reading
images:) from my PC. I can't get away from either green or magenta
tints so I'm going to jump into the deep end of the swimming pool and
switch over to MIS inks. I gather from what I read that I'll need a
spectro... device and software like Print Fix Pro 2(?) to make my own
".icc's" but I'm concerned when I read that QTR won't "see" those
custom profiles.

Any suggestion are greatly appreciated. I don't mind doing the "heavy
lifting" work to get quality B&W prints, I can't afford a new 4800
or wait for a 3800. And I don't want to give up 17 inch x 40 inch print
sizes from roll.

Thanks in advance. Alan