You can't link to specific pictures within a thread, you can only link to a page where the picture is for people to find, but I imagine that won't be all that difficult to do. Probably the best way to keep it pictures only is to start the thread with the first post as an example post, then add the link in there to refer to the other thread where you can discuss the fakes.
Try out a format, get some opinions, we can always edit it afterwards to change it to whatever works best.