Talking to a friend about being his ready hacked PSP-1000 but it hasn't been updated in a while and I know that more firmwares have come out since it had its CFW installed. He says its on v3.5 at the moment (likely M33) so... 1. Which CFW is the best GEN or M33? 2. Can I just run the latest FW installer for the chosen one or do I need to update sequentially?