devi solo modificare il file templateDetails.xml. la nuova struttura deve essere come questa:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE install PUBLIC "-//Joomla! 1.6//DTD template 1.0//EN" "
http://www.joomla.org/xml/dtd/1.6/template-install.dtd">
<extension version="1.6" type="template" client="site">
<name>nome sito</name>
<version>1.0</version>
<creationDate></creationDate>
<author></author>
<authorEmail></authorEmail>
<authorUrl></authorUrl>
<copyright></copyright>
<license></license>
<description></description>
<files>
<folder>css</folder>
<folder>images</folder>
<folder>html</folder>
<filename>index.php</filename>
<filename>index.html</filename>
<filename>favicon.ico</filename>
<filename>templateDetails.xml</filename>
<filename>template_thumbnail.png</filename>
</files>
<positions>
<position>nome posizione</position>
...............
...............
</positions>
</extension>