Originally posted by another user
Install x360SED between the Xbox 360 motherboard, and the drive. Solder only one wire (easy solder) on the Xbox 360 Pad synchronisation, on the console.
- Install Fable III using an original or a backuped game on the official Xbox 360 HDD
- Insert Fable III in the drive, and wait the picture appears
- Push the button synchronisation to eject the drive (using the x360SED exploit)
- Insert any original game, and push again the button synchronisation
- Hit A, and the game is launched