[Bazooka_Joe]

I've seen this done with skins, here's an example:

You use Paint Shop Pro 7 to copy an image, in this example, a face. You want to paste it over another face of equal size, the only issue is the face under it is lighter/darker than the face you are pasting on top of it, hence the new face is too light/dark for the neck, ears, etc. ..

There's a way somehow in PSP to blend both of them together to make a solid color, so it almost looks like the face is acutally part of the neck, ears etc. Does anyone know how to do this? I'm almost positive the method is called "Merging Layers".