Hello Community, I finally got things working on our new G2!
If you can't get your ADB drivers to install properly, go here:
...and download Corylulu's zip file - be sure to replace ALL the files in the "usb_driver" folder within your android sdk installation folder, or else WinXP will not recognize the .inf file. Then when you install driver, just point to the "usb_driver" folder.
I moved the original files and folders into a new safe-keeping folder just in case before replacing.