Things You'll Need
Instructions
Power on the PSP and scroll all the way to right side of the XrossMediaBar (XMB) to the PlayStation Network icon. Then scroll down until the "Sign up for PlayStation Network" icon is highlighted. Press the "X" button.
Select "Sign up for a new account" from the new screen. You will need to enter your name, an email address, your birth date and a username/password into the PlayStation Network form to continue.
Press the "Next" button, and then sign in to the PlayStation Network for the first time. Once you have successfully signed in, your PSP will automatically access the PlayStation Network each time you play a game with online features.