Things You'll Need
Instructions
Turn on your PSP by sliding the power button up. Find your Playstation Network icon, which is located all the way to the right in your PSP's menu.
Click the Playstation Network icon and you will be brought to the PSN (Playstation Network) home page where you can see the different things you can download.
Highlight the Demos icon, which is on the right side of the home menu. Click the Demos icon and you will be brought to the list of available demos.
Navigate through the demos and find your desired game. Click the download button and the game will be downloaded to your memory stick.
Find the downloaded game in your PSP menu and select it to install.