PSX, or PlayStation ISOs are the PlayStation game images. The Sony PSP plays PSX ISO files once converted to BIN files. You convert the Sony PSX ISO files through the use of a few programs, and then you play the games on your PSP. Once you transferred the Sony PlayStation BIN files, you play the PSX games right off of your Sony PSP. The M33 firmware or an Open Edition Sony PSP is required to play PSX BIN games.
Plug a USB cable into the USB port on your PSP and plug the other end of the USB cable into a vacant slot into your computer. Enter the USB connection menu in the "Settings" menu of the PSP.
Navigate to the IMG Burn website and click on "Download" to save the IMG Burn program to your computer. Extract the program and install it to your computer.
Insert the PSX game to copy to your PSP into your computer drive. Open the ImgBurn program and click on the "Create image file from disc" button in the "Read" menu to extract the PSX game to your computer.
Visit the PSP-Hacks website (see "Resources") and click on the "DOWNLOAD" link under the screenshot of the PopStation program. The download of the program varies depending on your Internet connection speed.
Open the PopStation program by double-clicking on the program icon. Look for the PSX ISO file that you copied to your computer and click on it to select it. Click "GO" to convert the PSX.ISO file to a BIN file that plays on your Sony PSP. When the PopStation finishes copying the file to your computer, browse in the output folder for the files "EBOOT.PBP" and "KEYS.BIN."
Transfer the "EBOOT.PBP" and "KEYS.BIN" files to the "\PSP\GAME\" directory on your PSP Magic Memory stick.