This is a photoshop action which sets up all your textures for the Unreal Engine. It works seamlessly with Soulburn Scripts.
You can download the Soulburn Scripts from Neil Blevin's website here:
http://www.neilblevins.com/cg_tools/scripts/pshop/soulburnscripts.htm
This actions help you organise your textures and save them out with the correct naming convention for Unreal
http://www.tomlooman.com/ue4-naming-convention/
To use this: save your master texture as T_name.psd then you can save out diffuse, normal, gloss and specular maps automatically.
Start with your diffuse map then run the action.