Originally Posted by joshll

Filter...using hue/saturation...then pen tool around the area you want coloured...grab your lasso tool, right click...select inverse, this should select the colour part if you make the penned layer invisible. create new layer, copy and paste your inverse selected part back to its place and line it back up into the original layer, then hue/saturate it back into colour.

Josh
From the guy with no references. ;-)