Rp Tutorials

It seems like I have a million questions everyday, but you guys (no gender bias intended!) are always so good at answering all of my questions. Here's another one for you: Where do all these iPhone graphics coming from? I see journals with contact posts setup that have a graphic that consists of the backside of the iPhone with its skin and then the front with all the apps showing up. If possible, I'd like to make one if there's some sort of generator out there.