Instructions
Launch iPSP by opening your PSP's Web browser and selecting the shortcut associated with iPSP.
Select the "About" icon. This icon contains a giant cogwheel and is near the bottom of the screen.
Scroll down the page using your PSP's directional pad until you reach the Updates section. Select a new update server from the Server drop-down menu.
Click "OK" to confirm your settings. If the server you selected doesn't work, repeat Steps 3 and 4, selecting a new server from the drop-down menu.