How to downgrade my PSP firmware?

michael

Active member
Hi,
I've always wanted to play certain games, but it seemed that my firmware was too old. Then I blindly upgraded my firmware to the latest official version 6.37. Now that I realize that I have to hack it, and there's no way I can hack 6.37 for it's not available yet, how do I downgrade my FW(firmware) to the latest CFW (custom firmware), I heard it was 5.03, that can play iso games (hacked). I also found some about using Pandora Battery to downgrade it to the factory default firmware, then upgrade to the desired CFW. Please, please, tell me how to do those things. Please.
 
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