Thanks very much for the clear, concise steps to perform the unlock/recovery/flash on an OTA 2.3.4 device, saved me a lot of time and headaches no doubt ;)
Only suggestion is to perhaps add the /etc/install-recovery.sh location to the step where you state to remove /system/etc/install-recovery.sh, as I did not realise this until after recovery failed on first attempt and I looked in that section.
I have flashed NottachTrix 1.3.1 with the Faux 1.3 kernel and everything is running great [I was running rooted Telstra 2.3.4 OTA, FYI].
As I had root on the stock rom I had performed a TitaniumBackup of my apps+data to sd-ext, restoring after the unlock/reflash works great!
Nexus 4 || Stock 4.2.2 - w/ unlock+root || Telstra
Atrix MB860 || NottachTrix 1.3.1 || Faux 1.3 || Telstra - Deceased
G1 || CM6.2 || Telstra - 3rd Retirement