This video is the how to on what you need to do in order to disassemble the G2 in order to remove the screen. There is a link provided for the reassembly in The video.
I was able to pick up a screen/digitizer/LCD from amazon for about 120. Make sure to pay attention to where it ships from. A lot of the sellers ship them from Asia and they take up to a month to come in. Mine came out of New York. Also the screen assemblies from OEM come with a kit with jeweler's screwdrivers and plastic pry devices in order to disassemble the phone or at least mine did.
Last in the video he uses a heat gun at some points. I did not need one throughout any of the process but may make it easier for you.
All in all I took me about an hour and a half to swap my screen out. Works like a charm.
Sent from my LG-VS980 using xda app-developers app