I just did some quick research with it.
You've got to open up the battery and remove the pin from one of the IC's on it? And that's all?
It seems like you flash the card on the pc, then pop it into the PSP and the modded battery drops it into a failsafe or something?
Doesn't seem too difficult, and I modded Xbox's back in the day.
Let me do some reading with it and see what I can come up with.
http://www.pspmod.com/forums/psp-har...ew-method.html
^^ that's what you're trying to do? But with the 3.80 firmware and not the 3.71 firmware?