This may be useful to others.
I was able to customise the Google API by adding/substituting some parameters:
echo "moolet_google_maps.setCenter(new GLatLng(-0.40, 34.67), 11);n";
the new GLatLng () function was substituted for (point) around line 131.
Because Google didn't recognise my "address" (point) , I had to manually find out what Lat/Long it was and convert it to decimal using:
http://andrew.hedges.name/experiments/convert_lat_long/The "11" is the zoom level which I changed initially from "6")
I changed the "bubble" or "marker" to an address I wanted to display:
echo " marker.openInfoWindowHtml('My new addr, County, Country');
(around line 144)
Also have to change the new GMarker line (around line 137) from "point" to your new GLatLng (.....etc)
Hope this helps.
It seems to work OK!