Maybe this isn't possible but does anyone know a way I could get a KMZ file that includes a raster image to save into Google My Maps. I can get the KMZ to display fine with image by uploading it to Google Docs and searching for it in Google Maps but when I go to save it in My Maps, the KMZ layer disappears and thus doesn't save it. I would use the KML import in My Maps but it doesn't seem to support uploading the imagery, only the vector data.
Any ideas?