It's simple. You get a link of your photo : http://fc08.deviantart.com/fs48/f/2009/212/2/3/CM_Punk_Wallpaper_by_FBM721.jpg
Then look at the top that shows those little icons, you click on the one that looks like this
You click on that, then get your link again : http://fc08.deviantart.com/fs48/f/2009/212/2/3/CM_Punk_Wallpaper_by_FBM721.jpg
And paste it in there.
If your successful, it'll look like this.
Then look at the top that shows those little icons, you click on the one that looks like this
You click on that, then get your link again : http://fc08.deviantart.com/fs48/f/2009/212/2/3/CM_Punk_Wallpaper_by_FBM721.jpg
And paste it in there.
If your successful, it'll look like this.