hey i didnt use my psp for a long time i think around 2 years and now i picked it up again ... i thought there might me a newer version of the custom firmware and i upgraded mine to 6.38 ME for psp 1000 i had 3 games in it soul calubure , dead or alive and final fantasy 9 ... now only final fantasy 9 is working other games give error " game could not be started (80010002) " soo now am thinking to downgrade it back to 5.50 m55-6 which i herd is currently the best but when i try to install it, it freezes