Digital BW, The Print

Andrew-

I'm sure most everyone will agree...don't waste your time. Gray 
Balancer is worthless, causes you to waste a huge amount of time and 
will never make good prints consistently.

You don't say whether you are on windows or mac. If windows, your 
choices are pretty much Image Print, some custom profiles or 
twiddling with the Epson driver/profiles (which are not really too 
bad if you run the printer calibration first). If you are mac, you 
have all of the above plus a number of free and nearly free 
applications that are well documented here.

Hope this helps (I forked out $$$ for Image Print and don't regret 
it),

Tom O'Connell