The tutorial that Preach has provided should do the trick! But if y'er still 'aving issues, then yes, "copy link" should do the trick if ye right clicked the image and that was the only option shown.
I'm not quite sure if the IMG code is any different from the normal URL code, as I 'ave not compared the two. I've always just used the normal URL code provided once ye right click an image. However, the IMG may work better, so I'd r'commend using that one if possible.