OK, I will give you the link to the file that you will need to add to google earth. They have a load of very good overlays on that site. the one I linked here is for all of the lands administrated by the Redding office.
http://bbs.keyhole.com/ubb/download.php?Number=1094720
Dave
http://bbs.keyhole.com/ubb/download.php?Number=1094720
Dave