(1) Go to the Saratoga site,
(2) download the "Google mesomap display" script and install it in the root NOT in the weatherxx folder.
(3) Adapt the script as described in the documentation on Ken True's site as a STAND-ALONE script.
If you need to install in the weatherxx folder, adapt the "$root" settings in this Leuven-script (weatherxx/mesomaps/wnGlobalFrame.php) also.