[b4u2]

I got most of this done. I am having a problem at this step.
Flashing the Recovery

-download PG86IMG-twrp-shooter-1.0.1.zip
-copy the .zip to the root of your sd card
-boot into bootloader without the usb cable connected (adb reboot bootloader)
-you may have to select the bootloader option
-it will scan your sd card, when it finds the PG86IMG, it will prompt you to install
-you now have a custom recovery
-power down phone, boot back into bootloader without the cable plugged in
-select the recovery option
-phone will boot into recovery, I strongly suggest doing a nandroid backup!

I cannot select recovery. When I press volume down at that point it doesn't go down to recovery and keeps reinstalling the recovery zip.

Also how do I do a nandroid backup?

Edit: renamed zip file and it worked now
Edit: I achieved ROOT. As for the nandroid back up I just did option 1