Sorry, havn't done the dragon head tutorial but if you projected them through the cameras then open your outliner and go choose your Front camera. Then open you attribute editor and click on 'enviroment'. in there are places you can adjust the translation. Again, I havnt done the tut so I don't know how it's done there. If it's just an image plane with a picture file as a texture then you *should* be able to move it the normal ways.