Digital BW, The Print

Sorry if this sounds too basic and I am struggling.
So much that I've read seems geared to RGB that I'm looking for advice about sharpening 
Grayscale images. Yes, I've searched the archives at DB&WTP, and Googled, and what I've 
found seems dated, RGB,  and unclear.
PhotoKit, Pixel Genius suggests 
1:Capture sharpen{easy/gentle with an edge mask}, 
2:Creative sharpen, 
3:Output sharpen, {for the method, size and DPI} 
meaning 2 or 3 sharpening passes. AND Photokit only works in RGB!
Convert to RGB? Then back again for output? What's the workflow look like?
Other sources suggest sharpening for output at the end of the workflow. {only one pass} 
I'd appreciate hearing from the experienced members on the subject of sharpening 
Grayscale images for Ink jet output. 
FYI
Mac OS 10.4.7  PS2
NEC LCD calibrated monitor
Epson R2400
Specific project is 645 B&W NEGS Fuji Acros scanned with an Imacon
Anyone willing to share their secrets?

Thanks,
Julian Kaiser