Instructions
Plug your PSP into your computer using a USB cable.
Select the "Settings" icon on the "Home" menu on your PSP. Select the "USB Connection" option to allow your computer to recognize your PSP.
Download PSPVBA to your computer from its website. Extract the contents of the ZIP file to your desktop.
Open the "Game" subdirectory within the "PSP" directory on your PlayStation Portable. You can access this directory while the PSP is plugged into your computer by opening the "My Computer" window from your desktop and locating the PSP in the list of devices.
Copy the PSPVBA files from your desktop to the "Game" folder.
Transfer any ROM image files from your computer to the "Roms" subdirectory within PSPVBA.