If you get the security error to get out of it make sure you have the LG support tool. Start it and put phone in download mode (vol/up vol/dwn pwr) then select phone recovery in the drop down menu. It will talk to the phone then download ICS and install it again. I found this out the hardway, I use Titanium backup and used the integrate system updates into rom which I did.... Seems this new rom doesn't like any changes at all being done to it.....