Curious about this myself, wouldn't mind making a few gifs or something to use as backgrounds.
I actually know more about PS3 themes than PSP lol. It is possible to make custom dynamic PS3 themes, but for those you're limited to applying/altering the dynamic effects of only a few of offical themes and putting them onto your own themes.
I'd assume the same would be true for PSP, but you never know, hoping it's possible to make your own from scratch that will work with CFW though.




