Thank you for this. I am using CS3, but there must be something wrong with my phtoshop. I have made brushes once, but when I select my image the "Define Brush Preset" is greyed out and I can't click it. Why does this happen? I have tried it on a flat pic, in RGB mode and in Greyscale mode. I even closed and reopened photoshop but it won't let me click that option.