Something similar to a flashcart for the PSP?

I was just curious, what are the methods for running downloaded games on a PSP? I happen to have one, and it's been collecting dust ever since my CycloDS arrived. Say, for instance, I wanted Patapon to run on it without the actual UMD. How would I do that?

you need a custom firmware installed on the PSP.

Okay, so I need to run that "Pandora's battery" thing and reinstall firmware, right? What is the next step? Would I be able to just load the roms onto my SD card?

its a memory stick not an SD card, but yes.

Okay. Makes sense. Just curious, why are there no PSP roms on Romulation? Could you reccomend a reliable site? (Thanks a million, loony)

we don't host them because there is an official demo site for PSP games. There is also pspisoz.com (I think thats the spelling).

Thanx captainbitter was just about to ask the same question.

downgrading a PSP is a bit of a mission if you dont know what you are doing. Easiest way is to purchase a pandoras battery from ebay or similar online store that provides them and then download a program that will make the magic memory stick for you. While downgrading make sure that you dont touch,bump or move the battery whatsoever, pulling out the battery during a downgrade will leave you with an expensive coffee coaster.

I think I might do it just because my PSP is already a coaster. It's got better graphics, but for some reason it can't beat the pick-up-and-play fun of the DS. Not to mention how much easier it is to navigate menus.