From README (translated):
CustomFirmware Enabler 1.0 to 5.03 ChickHen by Xenogears and Becus25.
A program that activates the functions of the M33 custom firmware using ChickHen.
What do I need?
- A PSP Slim (Slim only works with, regardless of the plate you have)
- Firmware version 5.03.
- ChickHen R2 (minimum)
- The functions are the same with the 5.00 M33, all work except:
- Recovery (Se cree may be anticipated that an alternative power to set the homebrew CFW)
- Pops (PSX Games)
- Copy the folder to your psp CFWEnabler in X: / PSP / GAME /
To be like this: X: / PSP / GAME / CFWEnabler / EBOOT.PBP
This is quite a good news for pirates. ;-)