DDR for PSP and it works!!!

[[TeRa]]

You can put any song you want, it reads files just like stepmania. Downgrading your psp has a risk of bricking it though, so be careful, and if it bricks, it's no ones fault but your own. Although, as things have improved in the hacking scene, bricking is less likely now, just make sure you read carefully and understand.

PSPR has been out for 2+ years I think.