This info belongs to: http://betterdigitalphotography.blogspot.com/2008/09/ansel-adams-effect-in-photoshop.html
To help achieve this drama I used one of the many simple techniques used in Scott Kelby's book, the photoshop book for digital photographers. Great book. I used the Channel Mixer in Photoshop to boost reds by 160%, greens by 140%, and reduce blue by 200%. Then made the output monochrome. It was that easy.