Digital BW, The Print

My 1280 driver (Windows)does not seem to allow the use of 2880 dpi 
except with glossy papers.  When using the Epson Matte Heavy setting, 
2880 dpi isn't even available.  That doesn't bother me when printing 
color or hextone.  But I would think using 2880 dpi would give 
smaller dots when printing "black only."

Is there a way to make the driver print at 2880 with matte paper?  
And is it worth it?  When printing "black only," can you get smaller 
dots at 2880 dpi than at 1440?  Or does the matte paper surface 
negate any advantage of the higher resolution?

I'm currently printing B&W with the Ultratone (1) inks, using Paul's 
curves for the 1280.  But sometimes I like the look of a B/O print.  
B/O also helps keep me sane when I can't get the hextone to look just 
right.  
:-)

Thanks,
--Peter