I have a 3D polygon mesh that I extracted from Google Earth and I've got an image of the same area.What I would like to do now is to attach the image to the mesh so I can get a DMT with a raster image.How can I do this?

See the tip:
http://www.cadforum.cz/cadforum_en/draping-an-aerial-image-on-a-civil-3d-terrain-surface-tip6802
 
Or much easier:
http://www.cadforum.cz/cadforum_en/put-google-earth-maps-directly-into-autocad-tip7852