The Xionia recovery.zip has a tendency to error out on install with a ZV5 baseband phone. Will work great with a ZV4 baseband phone (which is why I still keep a zipped version on the sd card).
racer00: Download the zipped version of the Xionia recovery from here:
[FIX]Black screen with custom recovery and custom roms - Android Forums at AndroidCentral.com
look at the very bottom of the first post. You will see an attachment which is the zipped version of the Xionia recovery.
Do not unzip, but, put on the root of the sd card like it is.
Go to the current recovery's menu. Go to the install package option. Go to the manual option. choose the Xionia recovery.zip. After it installs back out to the main menu of the ZenGarden recovery (it actually installed, you just need to boot into it). Go to the reboot system option. Go to the reboot recovery option. It should now reboot into the Xionia recovery if you did not get any install error.
If you got an install error then try the Cannibal Open Touch recovery's (COT) universal installer. Use it the same way as the instructions for the zipped Xionia recovery.
It can be found here:
http://forums.projectopencannibal.net/universal-installers/%28recovery%29%28zip%29-cot-v2-1-universal-installer-for-lg-optimus-devices
If that didn't work then you need to use the Unbrick guide here:
http://androidforums.com/optimus-v-...guide-unbrick-upgrade-optimus-v-easy-kdz.html
If you end up having to use this Guide read it over several times then ask questions before it is used. It has to be followed exactly to the letter.