HOW TO GO FROM FW V 5.01 to a CFW 5.00

You will need a PSP that is homebrew ( Custom Firmware ) capable. ( it means that your psp must have the Firmware 1.50, or a Custom Firmware )
If you have any of the Official Firmware of Sony 3.51 or Higher, then you will need to find some one with a PSP homebrew compatible, and create the Pandora Battery. This way you can make the battery, and use that on your psp to go back to Firmware 1.50, and then upgrade to one of the Custom Firmware. If you do not know anyone with a PSP with compatible homebrew. Then you can try to hard-mod your battery. ( This require you to actually opening up your PSP battery and do one modifying to your battery. ) Just be VERY careful or you might blow off your hand. Literally it will blow up if you are not careful. This you must look for your self on how to Hard Mod your PSP battery. Because there is a process in it that has Illegal files involve, and we are not allow to talk or show it to you in anyway. Good luck with your PSP, and be careful if you do try to Hard-Modding the PSP battery.