Bump! For more info..
It's pretty simple to do. Once you open your surfaces folder, you'll find a file called background.jpg. You open that with gimp2.8, photoshop, paint or whatever else you use and edit it there and then overwrite it.Or...Like the previous person said, find an image you like and save it into the surfaces folder where the background.jpg is located. Delete the original login screen and rename your favored image to background.jpg.
Thanks Man.. I'll try it later, but the size is matter or no size required?
Ahh ok! But the format should be jpg.? Just delete the old one in there and replace it right?