Pandora Battery enables PSP service mode, which allows up- and downgrading, unbricking, firmware flashing etc.

There's two ways to make it, and if you use the software method and didn't backup the serial first... well then head to the Sony Store you need a new battery! If you made the battery by clipping the wire (like I did) you need some extreme soldering skills, or if you just moved it you can move it back.

Once you're on CFW you can boot off a pandora (normal PSP cannot even charge a pandora) and the Despertar Del Cementerio software can also reinstall the original Firmware, as you need it (for ex. 330.pbp you will have on there allows OFW and CFW).

Did that answer the q?