How is this possible on the PSP?
no, seriously I want to fucking know.

Edit: the PSP version lacks a lot of the presentation and sound design of the original, it also has different racing physics.
I've heard people swear they find the PSP's physics more realistic but idk. The original is obviously better, still, it works on PSP. if you're a PSP nerd it's probably worth trying out there. I'd say play both but most people aren't wannabe video game archivists like me.