posted on May, 2 2004 @ 10:19 PM
Start off with the b&w image. Make sure it's set to RGB and not grayscale (I hate it when PS tries to think for me...).
Make a new layer. Set the layer->layer style->blending options-> (blend mode) to Multiply.
Pick your color. Use the brush, and it will just color the white part of your pic, not the black.
You'll be amazed at the results.
Let me know if that helped.
EDITED for bad spelling
[Edited on 5-2-2004 by darklanser]