Cannot get Android drivers to install on LG Thrill I've Googled everything I could think of and I can't get this to work.

I'm trying to help someone set up his Android phone - an LG Thrill 4G - to connect to his PC so he can text from his computer, back up his contacts, etc.  I downloaded and installed the SDK.  I used the SDK manager to install more stuff, including the Google USB driver.  I can see the usb_driver folder in the Android SDK extras folder, and I can see .dll files inside (if I remember correctly).  I've set the phone to have whatever USB box checked.  And, of course, I went to the Device Manager (he's got Windows 7), right-clicked the phone, and tried finding drivers online and finding them on the computer.  No dice.

Something online said I should run the dpinst.exe file and that it should be in the usb_driver folder.  It isn't.  Should this exist?  Is there another way to get the driver to install?  Should I take another route altogether?  What am I missing?
LG's site is terrible so it took me a while to find, but you can get the drivers for the Thrill from here: http://www.lg.com/us/support-mobile/lg-P925