In Haven City, go to the westernmost part of the waterfront area, (the place were the transport to the desert is) BUT make sure you do NOT pass the area the metal heads have taken over. Use the light jak flight glitch (X button and O button over and over) to fly behind the wall. There should be a casual-looking box there, walk jak into the box and position the camera to see inside the box. There you should see a picture of some of the game's developers. Happy Hunting!

P.S. More specifically, the location of the box is just a little bit west of the Naughty Otsel.