Digital BW, The Print

Hi all,
one thing that still puzzles me about ABW in the R2400, is whether
that mode can be used in conjuction with color management and use of
printer profiles or whether is better to be used with no color
management either by the driver or the printing software.
If the answer is positive for the first question, then is it
recommended to assign the cm to the printing software or to the driver.
I'm not completely ignorant on cm (or so I think)and so far with my
R800 and Qimage, it was quite clear what I should do (even though I
wasn't happy with the b/w results despite using custom icc profiles,
but now I haven't figured out whether I should abandon cm alltogether
if I am to use ABW.
Thank you