Downgrade PSP 6.20 firmware WITHOUT Pandora Battery?

[ben52646]

I would like to run custom firmware on my psp. before I can do that, I need to downgrade my psp's current firmware (6.20) without a pandora battery.

Does ANYBODY know how to do this?

Thanks,
Ben

 

[ben52646]

UPDATE:

I would like to run custom firmware on my psp. before I can do that, I need to downgrade my psp's current firmware *(6.30)* without a pandora battery.

Does ANYBODY know how to do this?

Thanks,
Ben