If you like that try this. I can show you a link to a tutorial if you are interested.http://www.earthboundlight.com/phototips/photoshop-really-smart-sharpening.html?search=edge+mask&bool=and
Thanks for posting this. Have you tested this technique against using unsharp mask on an RGB image? If so, what were the results?
Gavin Hoey's tutorial explained 3 Ways to sharpen your RAW images with ACR and LR.http://www.tipsquirrel.com/3-ways-to-sharpen-your-raw-images/