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Running CFW 5.00 m33-6.
My question is, can I just upgrade from this to a newer CFW like 6.20 PRO B directly, or do I need to flash it with OFW then follow a tutorial?
Also, I've been seeing mentions of dual booting CFWs, I've been out of the loop for the past year on PSP stuff (Left mine at a friends and just got it back.)




