Well this is how it works. You know the compartment where you would normally put your sunglasses. well i took out the part where the plastic portion near the bottom would hold the compartment up, but left the rest of it so it will still fold up. The psp fits perfectly inside. i have one of those rubber protective cases, the one that look like a comdom for the psp, so i acts like a grip.
I have a 2003 Tiburon, and the part comes off with a little force. The only thing is that it will block your view to the rear of the car, but hey buy a wireless transmiter and you in business.
i will have to take some pictures and upload them so it will be easy to see what i am talking about.