Things You'll Need
Instructions
Go to PlayStation.com and set up a free PSN account. You can link a credit card to it to purchase games and premium themes, but it is not necessary.
Turn your PSP on and go to the network settings to make sure you are connected to the Internet. Test the connection when it is set up to make sure it is stable.
Navigate to the PSN icon all the way on the right side of the PSP menu and select it. You will need to log in using the account you created.
Select the "Themes" icon on the PSN Store home page. You will be able to browse all the available themes.
Select one theme. Click "Download" to finalize the selection. Wait as it downloads to your PSP and exit the store when it is finished.
Navigate to the "Theme Settings" on the PSP menu and select the theme that you installed to activate it. The theme will change your icons and your wallpaper.