Download Hellcat´s Recovery Flasher, Despertar del Cementério v8, and Sony OFICCIAL 5.00.PBP. A little search on goolge and you´ll find it. First of all, format your memory stick using windows, when formating is complete, remove the memory stick and then press circle. Put the ms in again and toogle usb connection. Create:
ms0:
-PSP/
--GAME/
--SYSTEM/
Put Hellcat´s Recovery Flasher and Despertar del Cementério v8 into the GAME folder. Rename 5.00.PBP to 500.PBP and put it on the root of your memory stick. Run DCv8 to transform your MS into a Magic MS. Then run Hellcat´s Recovery Flasher and search for something like "Make battery a PANDORA one", enter it. Do what the program tells you. When you complete, put the MS and the Batery into the psp u wanna hack. It should power up, if not, turn it on mannualy HOLDING THE UP (or right, try both, one at time) DIRECTIONAL BUTTON, it should open the pandora menu, now just choose something like "INSTALL CFW 5.00M33-4" and wait until you it finish. Congratz, u hacked a PSP.