Custom Firmware 5.00 M33 Installer 4 PSP:
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Custom Firmware 5.00 M33 Update #6:
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Installing M33 Custom Firmware:
1. Download the 'M33 Custom Firmware' Installer.
2. In recovery mode, make sure the "Kernel Mode" is set to 3.xx kernel (or 4.xx or 5.xx depend on your version).
Hold "R" & turn on psp ->configuration -> Game folder homebrew -> 3.xx kernel.
3. connect your psp to your computer & create a USB connection.
4. extract the custom firmware installer to a folder on your computer.
5. copy update folder into the PSP/ Game folder.
6. close the usb connect and disconnect the usb cable.
7. go to game -> memory stick and run "psp update ver 5.00" program.
8. and now you know how the update work.. dont touch the PSP while it update =)