Hi Nicolas,
1. I found the Hikashop tabular thanks for your information. We are now using the NoNumber tabs and they fit better to our template.
2. I followed your link(forum) as you can see below(code) but I am a novice in all of these and I'm making now a fast learning curve. I am now searching for hours where these codings will be added i still cannot find it, can you give me a hint where? I understood I have to go to Display, Views, "product / show_tabular" , and then? where must I exactly add these codings?
<li id="hikashop_show_tabular_custom_li" class="hikashop_tabs_li ui-corner-top"><a onclick="displayTab('hikashop_show_tabular_custom');" href="javascript:void(0);"><?php echo JText::_('YOUR_TAB_NAME');?></a></li>
In the <ul class="hikashop_tabs_ul"> element.
Then add a div with content after the "ul" thanks to:
<div class="hikashop_tabs_content" id="hikashop_show_tabular_custom">
<!-- Your div content -->
</div>
Wella