This tutorial will tell you how to install custom firmware on your psp with the help of magic memory stick and pandora battery. In the first step you need to create magic memory stick after that you will use your magic memory stick with your pandora battery in order to install custom firmware on your psp.you can choose any CFW version you like to install from mms creator. You can buy pandora battery and magic memory stick from PSPoverhaul.com (Firmware/EBOOT guide free). Pandora kit becomes very handy because to run iso games and homebrews on your psp you need to upgrade/downgrade your psp firmware version. You can also use pandora kit with custom firmware installed for upgrade or downgrade psp.
Learn how to install custom firmware on a slim or fat PSP with this video guide.