Have you ever tried to automate Google Earth into an offline cache? This blog article shows you how to do it. It describes ways to load several types of maps offline, including topographical maps and Google Earth.
To download Google Earth for offline use, you will need software from DrRegener which is free to use. This allows you to create high resolution offline Google Earth caches that can be placed onto an external thumb drive and viewed as needed without access to the Internet. It is also a good way to manage mapping during an investigation.