Instructions
Go to the "PlayStation Network" icon on the PS3 main menu. Select "PlayStation Store." Use the on-screen keyboard to enter the email address and password associated with your PSN account.
Select "Themes &Avatars." Select "Dynamic Themes." Select "Game."
Scroll down to the "Heavy Rain" theme you want to download. Select "Buy Now/Download Now." If the theme requires credits, you will be prompted to enter your credit card information, such as the credit card number and billing address via the on-screen keyboard. After adding credits to your account, select the "Download Now" button. The PS3 will notify you when the theme has downloaded.
Go to the "Settings" icon on the main menu. Select "Theme Settings." Select "Theme" and select the "Heavy Rain" them you want to use. Select "Apply."