To make an semi-transparent border with a 1 pixel solid inner border:

1. open image
2. create new layer and make it active
3. Select All
4. Stroke in color of choice (black), Inside, number of desired pixels (45).
5. click on layer styles, stroke, change from red to black, 1 pixel, inside.
6. reduce layer FILL opacity as desired (20%).
7. deselect


forum discussion http://forums.dpreview.com/forums/read.asp?forum=1006&message=24914550&changemode=1