I have photoshop installed onto my mac but have no ide how to edit the photo like this: http://www.pinkbike.com/photo/2272617/

could someone please tell me how?

Thanks very much in advance!

Smanderson

Select all the bits that you want to keep colourd, go to ;
Layer>new layer>new layer via copy

go onto the background layer, go to the adjust saturration, and take the saturation all the way down.

sounds pretty easy! will give it a try.

Smanderson

less stressful way: layer mask -  duplicate layer>layer mask>destaurate>select brush and spray away.as long as you have selected the masked layer (layers palette and its white) and your brush is black you will start to mask the top layer leaving the bottom layer showing through, get it wrong and inverse you brush to white and spray your mistake back to how it was, and correct, if you zoom right in you get it supurbly accurate. adjust brush to suite.

yeah thats it........ i always work on a duplictae layer tho....

quickest way.

new layer - set to colour
fill new layer with black or white
use select tool / erazor to get away the desaturated bits to reveil colour.