Point comments

So I’m looking for something that kind of looks like the link below

http://themeforest.net/item/flexit-theme-for-photographers-and-portfolios/full_screen_preview/6229429

Where I can add comments to specific points in a picture

Yet because of my theme I can’t use a plugin which is its own gallery.

Any plugins that can add this as a feature but not ruin the integrity of the built in gallery, like the comments would be like meta data of the photo