Ciao Mario,
Have a look to Pierre-André site,
http://www.boock.ch/meteo/jauges.php
You can download the set of gauges corresponding to UV and solar radiations. If you analize it, you will find in it everything you may need.
To insert them in your stats, you will have to open for instance the year.XML (GW statistics directory), look at the data name of each information you want to include. Then you will modify accordingly the stats stylesheets (XSL files)
From a general stand point, each data present in the XML files can be displayed by modifying the corresponding XSL file.
I hope having been clear enough
73
Ciao a presto Mario
Jean
PS :sarò in vacanza per le due prossime settimane, se vuoi contattare mi passo io un messaggio.