Digital BW, The Print

Hi all
Just got my first try of this paper and was wondering if anyone could guide me to the correct 
settings for a neutral print using the Epson ABW mode. For that matter any tips would be 
most appreciated. 

My setup is R2400 MIS K4 inks with photo black. I use 16 bit greyscale tiff files with a 
working space of 2.2 gamma. Colour managed workflow utilising Roy's ICC program.

Many thanks Peter