To add a background .
Edit Your Chat[bottom right button above sign out]-Change Background- Copy and Paste a link of your picture- Post the link where the text says;-After posting the link click the Get Images button- Wait for the picture to load-Click the picture-Enjoy the background. Make your chat a group.
If you don't get it message me and ill help you out =P
I adore the background you've made. I will put it on if i find the time but I think it might take a few days for me to do. my computer blows and takes all day long to do the most minuscule of tasks..