Hi there
Only to tell you that there is a little bug in /views/reservation/tmpl/default.php
You have forgotten to close with quotes the class tag with value "clr" in the last div
<div class="bookingToolbar">
<?php
list($avail,$text) = BookingHelper::getInvoiceLink($this->reservation->id);
if ($avail==1)
echo '<a href="javascript:void(0)" class="aIconToolInvoice tool invoice" onclick="window.open(\''.$text.'\',\'win2\', \'status=yes,toolbar=yes,scrollbars=yes,titlebar=no,menubar=no,resizable=yes,width=640,height=480,directories=no,location=no\');">'.JText::_('Invoice').'</a>';
elseif ($avail==2)
echo '<span href="javascript:void(0)" class="hasTip aIconToolInvoice tool invoice" title="'.JText::_('Invoice not available').'::'.JText::_($text).'">'.JText::_('Invoice not available').'</span>';
?>
<div class="clr></div>
</div>
As I say you before a little bug :-), in my case the consequence it was that the paypal button was not visible, and instead of this some jscript code in the place of the button.
I see in this forum that are some people that are not putting in value your effort in making this component, I have to say the very best component I could see to solve our rent a car booking requirements, sincerely congratulations great job.