http://rapidshare.com/files/123251034/raaw.tif.html
My try.
1) Extract the luminosity from the channel palette. This would result in a BW image. For this I decided to use the R-Channel. You can even use the G channel if you wish. If you look at the B-channel, things are getting muted and muddy (there isn't contrast).
2) To this extracted R-Channle luminosity, put in overlay and run a high pass at raidus = 2. (Again, this is image dependent--you'll just to remember to make the edges pop subtlely.)
3) Click OK. Use the eyeball to see the effects of it. Another is to extract the B-channel luminosity in put on luminosity blending and run your USM at 50,30,0. Again, this will make those edges pop out.
4) close all the layers by pressing your eyeball and using your BG, copy the B-channel and run a "Find Edges Filter" on the duplicated B-Channel copy. You are making an edge mask here.
5) CTRL Click that edge mask and load it onto the R-Channel that you ran your HP settings.
6) Sharpen that R-Channel extract layer by using USM, 500% and R=0.2-0.3
7) Use your color picker took to select the highest pixels, I sampled mine from the face and set this to the foreground color.
8) I then went to Select, color range, and drag the fuzz until only the highlights on the skin are selected.
9) With the marching ants on the highlights already, add a color fill adj. layer and select 255,255,255 as your fill color.
10) Go into the mask and do a 1-2 Gaussian Blur filter to sort of smooth out the highlight.