RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:eginaGE overlay of Chalice's/ 2007 map. Image below. Positioning/scale no doubt probably needs adjusting. If you get it close, congrats.
You can adjust opacity, in the Properties once opened with GE. And change the size by dragging the edges and center of the image. I think the latitude is off on the image.
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="https://www.opengis.net/kml/2.2" xmlns:gx="https://www.google.com/kml/ext/2.2" xmlns:kml="https://www.opengis.net/kml/2.2" xmlns:atom="https://www.w3.org/2005/Atom">
<GroundOverlay>
<name>Yandeerra2007</name>
<color>8fffffff</color>
<Icon>
<href>https://i.imgur.com/xBSweld.jpg</href>
<viewBoundScale>0.75</viewBoundScale>
</Icon>
<LatLonBox>
<north>-20.88765282561608</north>
<south>-21.39525310266526</south>
<east>118.4866593360489</east>
<west>118.0098081375971</west>
</LatLonBox>
</GroundOverlay>
</kml>