Is there a way to downgrade my PSP Slim, currently 3.71 M33, to 3.60 M33? I have Pandora's Battery and Totalnewbi memory stick installer. It was 3.6, upgraded to 3.6 M33, then to 3.71M33 but a game doesn't work and I'm looking for a way to get back to 3.60 M33. Also I was wondering if 3.6 M33 totalnewbi installer will work on a fat PSP. Thanks a lot.