1. if you are flashing a stock drive update on live first then follow jungle flasher tutorial http://www.jungleflasher.net/files/JungleFlasher.pdf (flashing is the same as older firmware)
2. if you have a flashed drive the easiest method is to update from cd or usb http://www.xbox.com/en-GB/support/xbox3 ... update.htm
(the only reason to flash to stock firmware is to update from live)
i hope this helps
