PSP Backgrounds

[Vampyr]

Can anyone provide me with a link to the original background on the PSP? The one that moves and changes colors each month? I'm interested in changing my background, but I don't want to get stuck with one and not be able to go back to the original one, because it is pretty good.

Also, for those of you who are using custom backgrounds, if you have your PSP set to go into standby mode (or whatever it's called with the PSP screen goes black but it's still on) after a few minutes, can you still get ghost images, or does that image have to be constantly on the screen?