Esto para ps3 key, PERO OJO!!!!!! Perdereis el bootloader del ps3key y no podreis poner mas sus actualizaciones...Cada uno que actúe bajo su responsabilidad, tampoco dice si deja un bootloader.....
For anyone with a Ps3Key:
Once you flash it this way, there is no way back, you always have to use the teensy 1.0 hex because you erase the Ps3Key bootloader.
1 - Install the Atmel FLIP program.
2 - Insert your PS3Key in bootloader mode
3 - Windows will detect the new hardware as AVR Key (AVR DFU Bootloader) and you have to install the drivers manually, you will find them in the directory where you installed the Atmel Flip program (Example: C / Program Files / Atmel / Flip 3.4.2/usb)
4 - Run the Atmel Flip, and go to to device and select ATMEGA32U2.
5 - Go to Settings> Communication, and click on Open USB.
6 - Trough the file menu open the the Hex file (in this case the psn online hex)
7 - We leave all options enabled and start the erasing and programming.
8 - It will erase the PS3Key bootloader, and put the teensy 1.0 hex file on it.
Enjoy
Fuente: Psx-scenne en el hilo con este mismo tema