You can download the Google Panel files here in the "Google Panel.zip" file. This Zip contains the files needed for the google panel (including some renamed files to work with the VodafonePanel registry settings).
Download the file, extract it somewhere on your pc.
Make sure your phone isn't on the Vodafone Panel and connect your phone to the pc and open Program Files/Panels/VodafonePanel/
Delete all the files (don't worry, I've uploaded a copy of the original Vodafone Panel files too)
Now copy all the files from the Google Panel you extracted to the phone into the VodafonePanel folder
Disconnect your phone from the pc and press the panel key.
Enjoy the Google Panel