Curled Photo Effect

Does anyone know how to get this effect in the icon below? I've seen several icons from different people with this exact effect so I'm assuming there's a resource out there somewhere (but I can't seem to find it). As much as I'd like to have the resource, I'd also like to figure ot how to do this myself. I've been experimenting with the transform > wrap command in CS2, but I just can't seem to get it to look realistic. Mine ends up looking more distorted than anything.



Icon by kookicon