button-like effect

[Ron Bombard]

Greetings!

I'm trying to figure out how to create this type of effect using gimp.  Where 
the edge of the image is 3D sort of... looks like a button.  I've attached a 
sample.

if I could be pointed in the correct direction, I would be grateful.

Thanks.

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   ---- File information -----------
     File:  malt.jpg
     Date:  21 Aug 2000, 17:20
     Size:  6860 bytes.
     Type:  JPEG-image

malt.jpg