Its possible, and pretty esy. Go to your entity bank and open up the Model Pack 57 folder.(I think its called Zombie Apocolypse 2). Take a look at the textures that are used.
Then assign the same textures for whatever character you want to have it as well, and assign the character the shader that comes with the pack.
The normal map for it, is different than others ive seen. Bond1 mentioned he did something in photoshop to achieve it. If you have Gimp(its free) use the normal map filter,(it might be a seperate download).
Make sure your texture has an alpha channel, and in the normal map filter is an option for "alpha channel" Choose height, and then check "Swap RGB".
I am not sure if this is similar to what Bond1 does in Photoshop, an I dont now much about textures or modeling, but Ive tried various ways to get this shader to work on other models, and this has done very nicely.
The _S texture, are also a little different. What i do is change the hue to very low blue, with low saturation, then adjust the brightness and contrast
Ive attched an image of the shader on the Dante character from the Freaks and Abominations pack
I recently learned to sleep with my eyes open. ..... God am I tired
