Once again, PSP owners can now install and run their own software on PSP handheld game devices, thanks to some hackers who've defeated Sony's 2.01 firmware, which contained anti-customer measures that shut out homebrew games. On Dec 1, some cheats were published that allowed players of "Grand Theft Auto:LCS Trainer" to add new weather conditions and other play options. This gave firmware hackers the crib they needed to unravel the game-format, and thence the whole firmware. Now a new hack allowed PSP owners to once again play homebrew games and add new functionality to their PSPs. [BoingBoing]