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there is a way, but you will need another psp with a compatible motherboard that already has cfw installed. your psp cannot softmod a pandora battery in its current state (if at all, depending on which motherboard your psp has). that being said you can still play homebrews through the half-byte loader, which works great on 6.37.
I just updated my PSP 2000 cause I was annoyed with not being able to use the games I actually bought. So it's good to know I can still play emulators and shit.