Instructions
Turn on the PSP, and connect it to the Internet via a Wi-Fi or Ethernet connection.
Go to the PSP's main menu, and scroll to "Network."
Select "Internet Browser," press the "X" button and click the "Triangle" button to display the web browser.
Navigate to "Tools," select "Settings" and choose "View Settings."
Locate the "Flash" option, and press the "X."
Wait for the Flash player to show the "On" message.