text: the only way to unlock jake the snake roberts is to buy him on the psp version and then connect your psp to your ps2 via usb and then he will apear in the shop. he isn't that good though so unless you have a psp and have  svr 2006 and have bought him... then i wouldn't bother. I bought it on psp just to do this, and i was so dissapointed, he is rubbish.\nhope i helped..