Thanks for dumbing this one down, but I think I managed to screw things up anyways.
I've gotten the dreaded "Security Error" and can't seem to get the phone to be recognized by the computer anymore. I can get the phone to the S/W ugrade screen, the drives load, but the adb, the lg software, fastboot, all don't recognize the phone. Did you ever run into something like this? If so, what methods did you use to unbrick?
** EDIT **
So I was able to finally get it to fastboot using Lelus fastboot package. Kept trying to load the files for JB (option 7), would get the flipped fastboot screen, phone would restart. Would enter S/W update mode but not communicate with KDZ. Instead I used option 5 to load ICS, got the flipped screen again, waited for the phone to restart, entered S/W update mode, and now KDZ connected to the phone. Currently going back to stock before trying unlock boot loader again