Digital BW, The Print

I have a set of MIS FS-N with the epson driver in a 4 color printer 
and I would like to use de MIS VM. Will be possible to use the MIS FS-
N black and Cyan and Magenta position adding only the yellow position 
from the MIS VM. Are thoses inks the same? or I should get a new ink 
set?
thanks in advance
manuel