Instructions
Turn on your Sony PSP 3000.
Select "Settings." This is the first option on the PSP's horizontal dashboard menu system.
Choose "System Update."
Select "Update via Internet."
Press the "X" button on the front of your PSP. Your PSP will download the necessary system update files automatically. The update will install and your device will reboot itself. You will no longer receive error 80020148 when trying to play games.