I found out that it is now possible to add ground level images to Google Earth by using
Panoramio - Photos of the World, a website owned by Google. Just upload your pictures and use the map to place where they are from, once they are reviewed they'll be added to Google Earth for all to see. In Google Earth a blue dot will be placed where you said the picture was taken and if clicked on, will reveal your photograph.
To see this in action, look up this address:
8236 Bandera, 78250
That will take you to the vet clinic I work at, which I put a picture of.
My other pics are at:
Panoramio - Photos by ZacharyDY4
You'll see a few of Downtown San Antonio, and some houses I've lived in etc...
Pretty cool eh?