Go to the All Things Root Guide sticky. Go to Direct Downloads. Download and install the LG USB drivers. Right after they install (leave phone unplugged), restart computer. Then finish install by plugging in computer.
Go to Tools AND Utilities. Download and install the Java jdk. Write down the Path to the java.exe. Mine was C:/Program Files/Java/jdk-1.6u45/bin.
Go to Tools AND Utilities. ADB. Alternative Method. Follow directions. Click on last link for instructions on how to set the path manually. Mine was C:/SDK/platform-tools.
Instead of just setting path to adb.exe, your going to set the "Class Path" to the java.exe as well. While in the environmental variables, in the same box you scolled to find the Path, scroll to find the Class Path. Write down the current path and then totally delete. Now put in path to java.exe you wrote down earlier. Make sure to put the " before and after.
Go to Tools AND Utilities. Droid@Screen. Download and put on desktop. Open up. You will be given a setup box. Click on the little folder. Go to C:/ drive, click open. Go to SDK, click open. Go to platform-tools, click open. Go to adb.exe, click open. Exit setup. You should now see a box pop up thats black inside.Exit both boxes.
When done let me know.