i'm not a mastermind, and i'm not shure, but isnt this just that you blur (with the blur tool...) everything on the background? there are plug-ins (i don't know which, but i see them sometimes...) that could blur, and you only have to say what you don't want to blur... maybe one of these plug-ins is called distance blur??? i hope i've helped you a little bit... (not mutch maybe, but hey... i'm not a mastermind ;) )