Digital BW, The Print

I would like to try BO on my R800 but cannot find an option in the 
driver to tell the printer to use only black ink.  Will sending a 
gray-scale file accomplish the same purpose?

While I am on the topic, I find the paper feed in the R800 very 
touchy, to say the least.  I am begining to wonder if there is a 
problem with my printer or if that is a general characteristic of 
this model.  Any thoughts appreciated.

Steve