correct
that has caused bricks in the past, is this a suggestion based on success or a guess out of thin air? be careful making suggestions unless you know they work, i mean...i know you are tagged as a developer.....but using the flash as phone option has never ended well for any other Samsung phone
<ID:0/008> Firmware update start..
<ID:0/008> boot.img
<ID:0/008> NAND Write Start!!
<ID:0/008> FAIL! (Auth)
<ID:0/003> Firmware update start..
<ID:0/003> recovery.img
<ID:0/003> NAND Write Start!!
<ID:0/003>
<ID:0/003> Complete(Write) operation failed.
+ 10% - phone rooted trough system.img tricks -> http://xdaforums.com/showthread.php?t=1756885 (by invisiblek)
ROM analysys:
boot.img -> signed
recovery.img -> signed
system.img -> not signed
cache.img -> not signed