Site has fixed position, makes images fixed as well, how can make the images scrollable?

[Thomas Fitzgerald]

The div that I have the gallery in has a position:fixed but the div does scroll up and down. The image, once clicked and opened, does not scroll and only shows the top half. I would like the image to be about 800 px wide and still be able to scroll up and down so I can have a description. I tried adding a .scroll() event to the img but it didn't work. Any feedback would be awesome.