Hold on, don't look anymore, I found it on PSPupdates.com.
I also found a great website that has premade backgrounds...not sure if I'm allowed to post it because they have some 17+ stuff on there, but I can PM it to people that want it.
Does using custom backgrounds take up any more space on the mem card than the default ones do? And are you just using photoshop to make your icons and such?
And about the ghosting problem...my PSP screen goes black after like 2 minutes of inactivity, so that should protect me from it, shouldn't it?