Wallpaper for PSP fat

[Samurai X]

Now ive seen that my friends have cool wallpapers in their psp slims now i was wondering, can i do the same thing with my fat psp if so can u explain how.if not o h well. If youre at your house screaming WHAT A NOOB!!!!!!! then im laughing out loud because i seriously don't know srry.and i don't really care either it doesnt matter im a good guy so it doesnt bother me

[Micr0chiP]

Simply put it on the pictures folder on your PSP, when seeing the picture you should get the option to use that picture as a wallpaper.
You can resize the picture so that it fills the screen if you need or if the PSP gives a message saying that the picture is to big, the size should be 480 x 272.

Currently using this one

EDIT: or you could make a google search for PSP wallpapers and have the job done for you, like this one here