Quote - Preparing Long Hair Evolution Make sure you have Kozaburo's Long Hair Evolution installed.

I found the textures in runtimetexturesKozaburo.

Bring the file long_evo_platina_tx.jpg into photoshop. We want this one because it will be easiest to remove the highlights from a lighter hair color than a dark one.

The background on this texture never shows up in the render, but it will unfortunately influence the following steps so we need to adjust it.

• Choose menu item Select/Color Range to bring up the dialog box that lets us select pixels of a given color range.
• In the Color Range dialog, set the Fuzziness to 20. (Other textures may need more fuzziness. For example, short bob needed around 40+)
• Click on the dark ground background in the picture to select that color. Don't click on the hair.
• Press OK to Dismiss the Color Range dialog
• Leaving the selection active, convert the image to gray scale by the menu item Image/Mode/Grayscale
• In the color picker palette, enter 25% - this should load a light gray into your tool.
• Hit Alt-Delete to fill the background with this light gray color.
• Clear your selection region by hitting Ctrl-D.
• Choose menu item Filter/Other/High Pass...
• In the High Pass dialog, enter a Radius of 15.
• Click OK on the High Pass dialog. The highlights are now gone.
• Choose menu item Image/Adjust/Levels...
• You should see a black peak in the middle of the Levels dialog. Press Auto to strengthen the contrast. If the lower bound is not tight with the group, move it up manually.
• Dismiss the Levels dialog by hitting OK.
• I prefer less grainy textures so I usually shrink the texture here. Select menu item Image/Image Size...
• Make sure "Constrain Proportions" is checked.
• Make sure "Resample Image: Bicubic" is checked.
• Enter a width of 1024. The height should adjust to 954 automatically.
• Dismiss the Image Size dialog by hitting OK.
• Use File/SaveAs to store this image in the same directory, but under the name long_evo_generic.jpg. Use Quality 10.

That's it!

You now have a texture from which we can make an infinite number of colors in the material room.

i just wanted to post the high pass filter. and then i see that you already explained it. 
http://unsharpmasked.com/blog/2008/08/photoshop-high-pass-filter-removing-wrinkles-in-fabric-part-2/

also very good for skin.