I have a picture (well 2 actually) that I want to merge to produce a single
image

One picture is slightly differently exposed than the other being slightly
lighter at the bottom and slightly darker at the top. I want to adjust the
brightness of this picture on a gradient basis (so that I make the bottom
slightly darker than it is and the top slightly lighter than it is.)
Can one use gradients in this way?
How does one do it?
Thanks for any help
(Photoshop 6)

--
Sam
He uses statistics as a drunken man uses lampposts - for support rather than
illumination
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