Buliarca Cristian shares BCM Panel for Photoshops, a script that allows you to quickly set up layer groups for all your texture maps, including Diffuse, RGB, Specular, Normal, Alpha, and more, with a click of a button. You are also able to set up an entire PSD document with default groups you would need for your texture channels.
a script that allows you to quickly set up layer groups in Photoshop for all your texture maps
One of the great things about the BCM Panel Scripts is that you can save out all your texture maps at once from a PSD file, writing out .tga files in your project directory from all your map layer groups in Photoshop all with the click of one button.
Buliarca Cristian also has created a 2D array function within Photoshop, similar to a array in 3ds Max, which will allow you to control transformations and opacity of array layers. Check out the BCM Panel for Photoshop here.