thanks a lot for all of you guys!
especially zefie, beezy, and cordell (for having same problems like me)
well, pardon my english, since it's not my native. and pardon me for being such a noob with the first post was posted here

but for 5 days i got frustrated just because a small mistakes (my optimus can't respond anything, unless it got debugged, or receiving a call), than suddenly it grows into a brick. well, at first i quite confused with the steps. (my version was ZVD, and I'm not sure if this version can work too).
after dozens of trial (by clicking restart confusingly and a little bit clueless about when to do which steps) finally i got it.
and just for sharing for a noob like me, who got quite "fortunate" to brick their optimus

lol
and this is especially in step 11 :
first, like zefie said, that when you got "Phone Mode 2" and just before the updating progress appear, disconnect your phone (this worked for me: just pull out the battery first, so the power source just came from the cable)
second, reconnect again, and the screen will said anything about downloading, but this time, without the bright-red "Emergency Mode".
and still without pushing any button, just push the restart on LG updater again.
and once again, thanks so much for all your sharing of expertise....