All you have to do is overlay your image, re-size or crop it to match the replaceable layer’s size, and save it for the web. I have also listed the most commonly used Facebook images and their dimensions below. Sometimes, when a bunch of students use an app like this, we see how good it really works. I’ll be sure to let you know. My Fake Wall (no longer functional) This is a cool template, much like Fakebook. I really like how it is set up.