How do you take the psp screen off?

Massive EDIT:

There are a set of screws behind the psp, underneath a sticker in the battery compartment which can be removed to access the internals of the psp.

A hammer is not required, and apparently only people with an IQ below 12 would use that approach... All you need is a small Phillips head screwdriver, and an exacto knife to lift the warranty sticker. I suggest you use latex gloves so you don't leave smudges and finger prints on the LCD screen.

original edit:

I would not recommend trying this but:

1. Take a hammer 2. Break the screen 3. Remove the pieces leftover

Oh and this WILL ruin your PSP console (that was also not sarcastic, you have to break the screen to get it off)