Digital BW, The Print

> Question : how to sharpen the finalized version of my pics in PS7 
> without going down to the 8-bit mode and then back to the 16-bit for 
> the print process?

Use RKD Smartesharpen X.

You can buy a copy and read a review here:
http://www.outbackphoto.com/filters/01_smartersharpenX/smshx.html

Neatimage Pro can also do 16bit files and will sharpen without
enhancing grain:
www.neatimage.com