yes, psp version 2.0 has been cracked. a 1.5 downgrader is available but the added features of 2,0 are making users want homebrew on that system.
at the moment the exploit uses the picture buffer memeory to use the programs, such as file sharing using the picture sending feature. its in early days so far and sony are expected to release a 2.1 version to combat it.
gta liberty city stories is on its way soon as well… 21st to be exact… 7 modes of multiplay.
going by the excelent multiplayer dgs,pete and i had on saturday night ill be definatly after the fun of gta…
