Instructions
Download the Homebrew Channel application (See Resources) onto your computer.
Plug the connection cable into the USB port on your PSP, then plug the other end of the cable into an available USB port on your computer. A folder for your PSP will automatically open on your computer.
Drag-and-drop the Homebrew application file into the System folder inside the PSP folder on your computer. Press the "Power" button on the PSP to turn the device off, then press it again to restart the device. The Homebrew application will automatically install itself onto the PSP system and open the Homebrew home screen when the device starts up.
Select the "Games" option on the main home screen. This will bring up the listing of available games.
Select the "Sailor Moon Plus" listing, then press the "Enter" button. The game will automatically download and install onto your PSP.