GodzIvan strikes again with an update of the Xbox 360 NAND flash write protection chip now called NWP CHIP v2 [Nand Write Protect Chip V2]. This version uses the Xbox 360 native LED ring (instead of a bi-color LED) to show status, so all you need to do is to flash a PIC12F629 microcontroller and install by soldering wires. After checking the diagram I think the solder points looks easier as well.
LED RING RED -> UNProtected
LED RING GREEN -> Protected
LED RING ORANGE -> SETTING
LED RING BLINK GREEN -> STATE SELECT ENABLE
LED RING BLINK RED -> STATE SELECT DISABLE
LED RING BLINK ORANGE -> SAVING
1) TURN OFF THE XBOX
2) STATUS = Press the Sync Botton for 3 secs (GREEN = Protected; RED = UNProtected)
3) SETTING MODE = Press the Sync Botton for 6 secs (till ORANGE = Setting)
4) SET PROTECTION = Press the Sync Botton for changing the setting (BLINKING GREEN = Protected; BLINKING RED = UNProtected)
5) SAVE = Press the Sync Botton for 6 secs (till BLINKING ORANGE = Saving)
GodzIvan also released hex dump and diagrams for CMD RF controller v0.1 which makes it possible to use the Xbox360 RF module (with game controllers) by connecting it to a PC. Thanks for sharing!