Silly Rabbit, Go to the All Things Root Guide sticky/Tools and Utilities. The Java listed links to the proper java jdk. Once you have it installed go to your program files on your C:drive. Go to the java folder. you will see the new java jdk that you installed. Go to the bin folder, you should see a java.exe.
This is the path you need to put in the environmental variables "class path"
Example: "C:/Program Files/Java/jdk-1.6u45/bin"
Make sure you delete the old one and make sure you put the " on both ends.
Go to the same section in the ATR guide sticky. ADB/scroll down to the Alternative Method/ click on the link. Follow the Tutuorial. Go to the last link at the bottom for instructions on how to set the path to the adb.exe manually.
Go to Direct downloads/LG Optimus V drivers.
Once you have them installed, reboot the computer (this will allow for the installation of the other two drivers, there is 5 in all). Once rebooted plug phone into the computer for the final installation of all drivers.
Go to the phone. Menu/Settings/Applications/Development. Turn on ADB debugging.
Download the ZenGarden Recovery and the flash_image. Rename the Zengarden recovery to just zrecovery.img (this just makes it easier when we get to typing in shell commands to the phone thru the android debug bridge-adb). Put both on the /sdcard directory of the SD card (it's where all the file folders are, just don't put them in a folder).
To be on the safe side also download the Xionia in it's zipped form, the ZV9 security update, and the EManUL3XXX root zip. Put the root zip on the computer (unzip), and the others on the /sdcard directory (leave them zipped).
Note: The Xionia zip can be found by clicking on the last link in the recovery section. Scroll down to the bottom of the 1st post. You should see an attachment. That's it.
Now you are set. Let me know when all this is done.
Will be back in about 22 hours from the time of this post.