Complete versions of several PSP games have surfaced on the web. These "ISO" format files are essentially the contents of the entire UMD disc that the game came on. As this no easy way of creating UMD discs unless you’re a games publisher, then that doesn’t mean that pirate UMD discs will be available soon. But it will encourage the emulator scene to try and create a PC emulator to play PSP games on your PC.
Simon M Games Digest