This is a quick instructable about how to make your OWN custom background in vista (im not sure about other systems, but i did it in vista.
it involves using an awesome screen saver (called mystify), adobe photoshop and a little bit of luck.
with my name it's relatively easy do this, because it's small and the letters are basic - so you should always use 'short' names.
Samuel becomes Sam in my case.
Johnathon becomes John.
and so on...
Step 1: What you need:
Adobe Photoshop or another program that allows you to work in layers.
Vista or a screen saver like Mystify in another operating system
luck, timing and the ability to concentrate over a potentially long period of time.