ok, I did not know that they were that, I paid for them so I should be able to add veins to anything I seem fit as long as I don't call them mine or sell them as that.

now answer my question, you are the photoshop person?

I'll paraphrase how do you go about adding the veins to a texture? Let's say a locomotive that I made myself or some of my own creations. I just used the G8f texture as an example 

The veins were bought from somebody named AJ. some long long time ago in a faraway galaxy.