This is the newest PRO Custom Firmware PRO C for PSP firmwares 6.20, 6.35, 6.39 and 6.60 You can flash install this firmware running on OFW and install the Permanent Patch (CIPL) Flasher or use fast recovery for any other PSP thats not a PSP 1000 or 2000.
PSP 1000, 2000 Install:
Once you've downloaded the file 6.XX PRO C UPDATERS, I will use the 6.60 Firmware for an example. Open the 660 PRO C folder and you will see the seplugins and PSP folder, Put your PSP in USB mode and open up the PSP folder in the extracted files and then the GAME folder, Inside that folder you will see PRO UPDATE, Fast Recovery and CIPL_Flasher folders, for the PSP 1000 and 2000 models Take the PRO UPDATE and CIPL_Flasher folders and place them in the ms0:/PSP/GAME folder and then exit USB and run the PRO UPDATE and then once that is done run the CIPL Flasher.
PSP 2000v2, 3000 and Go Install:
Once you've downloaded the File 6.XX PRO C, I will us 6.60 Firmware for the example. Open the 6.60 PRO C folder and you will see the seplugins and PSP folder, Open the PSP folder and you will see the GAME folder, Then open the GAME folder and you will see PRO UPDATE, Fast Recovery and CIPL_Flasher folders. Take the PRO UPDATE and Fast Recover Folders and place them in the ms0:/PSP/GAME folder, or if your using a PSP Go ef0:/PSP/GAME folder. Exit USB and run the PRO UPDATE, once that is done set up all your settings and then run the Fast Recovery and then your done. If your system ever crashes just use the Fast Recovery and you'll be back to normal.