Lik Sang sent me a Screen Protector that also changes the controls on the PSP, heres the info about it:
Protect your PSP from scratches and damage. Includes a raised analog stick for ease-of-use. Also includes a Mini D-Pad stick. Provides an effective Anti-Shock protection.
Heres an excerpt from the review
The cover has a much better analogue stick which to be honest ive left on and installation of the stick was really easy, basically it just pulls off. The screen itself is made of a good clear rigid plastic and you have the raised buttons on one side and the joystick on the other side, the device itself screws into the 2 holes on top of the PSP.