You have to have your psp modded with custom firmware, once you have done that then you download the game torrent that you chose and you copy the files into this folder called game. well anyways depending on your psp generation will make the way you mod it vary due to different firmwares. keep in touch and i'll help ya
You can try this, my hubby used to do it this way. It is without torrents which is better as far as I know.
you download the game, attatch your psp to your pc with a psp usb cable and copy them over.