This cover was actually done in under ten minutes, I used an action from rocked-out (http://rocked-out.deviantart.com/gallery/), sadly when I checked to give you the set number I saw that s/he removed most of her stuff. But a few action sets are still available. You should definitely check the galleries out. I uploaded this particular set of rocked-out here (http://www.mediafire.com/?43ps9wa01qp4bht), I'll remove it once you download it. I used PS Action 48 on that blend. So you download the zip, unzip it and put it into Adobe - Presets - Actions and double click on the set. Now it should load in PS and there you can play the action, but I would recommend to use a copy of the original project to possible undo the changes.