This is Clockworkmod Recovery v6.0.2.8 v1 for Optimus G Pro.
As you all know, it's 2nd-init recovery. That means if your phone bricks, only lgnpst will revive your phone.
First its how-to is same as the first one with small letters on it
1. Install application that I uploaded
2. Open it and Click 2nd-init recovery
3. Click Reboot recovery to see it worked.
As you know, we cannot change boot image. That will brick your phone.
And if you want to reboot recovery by pressing button, reboot it and you will see button flickering. Than you have to click any button. Fast.
That's all. And of course, you have to have your device rooted.
[출처 : http://forum.xda-developers.com/showthread.php?t=2284298]