That's me too little.
That's why I've written this few lines of code.
They will also convert entries with "http://www." in the begin to links.
For example, both use the template "alternative".
Open "/components/com_jevents/views/alternative/icalevent/tmpl/detail_body.php" and go to line ~130.
replace
echo "<b>".JText::_('JEV_EVENT_CONTACT')." : </b>". $row->contact_info();
with
$rowcontactinfourl = $row->contact_info();
if (strpos( $row->contact_info(), 'www.' ) !== false) {
if (strpos($row->contact_info(), 'www.' ) == 0) {
$rowcontactinfourl = "<a href='http://". $row->contact_info() ."' target='top'>".$row->contact_info()."</a>";
}
}
echo "<b>".JText::_('JEV_EVENT_CONTACT')." : </b>". $rowcontactinfourl;