Digital BW, The Print

Hello, 
I print UT7 on a 2100. On Premium Semigloss I get very good results
with "cool", actually they look very neutral. As I find the carbon
(let alone the Sepia) curve too warm for my taste I would like to have a
slightly warmed up curve - same tone as with BO printing. 

I could print BO for a warm tone, however the transitions in BO are
not as smooth as I like them to be, specially in the darker greys. 

Is there an easy way to tweak the curves to get a mix of "cool" and
carbon"=?

Regards, Bernie