Software developers have figured out how to extract files from the Universal Media Discs used in Sony Corp."s new PlayStation Portable handheld video game device, though there is no way to play the games extracted from those discs. Some details of the exploit were posted Wednesday night on the Web site PS2nfo.com, along with lists showing all the files pulled off the game discs for "Ridge Racers," "Wipeout Pure" and "Vampire Chronicles."