There is a much easier way of doing that, and there's so amny other tools for doing it too. How about using an alpha map so that you can go back at any stage, or applying the layer as a tint, or hue or something like that. The way you suggested would take too long anyway.
No offence, but when you use photoshop prefessionaly tutorials like this annoy me.
it wasnt photoshop per se, but just a more advanced art program
The game itself is realy good, spent hours tuning up my car. There's one major bug, I can't save! Using a mac you can copy the text on the save page, this is realy annoying :(
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