Till now no reply from anyone :s.
Can't even contact TelaFirma about this. Seems to be getting to an dead end.
The problem is that you cannot set any heights or width attributes, which is needed to load the cached images of TelaFirma's mod. I'm quite far with this. The only thing what has to be done is replace the <a href code of the thickbox with the TelaFirma's code to get it working.
Code for popup of the lightbox:
Code:
<a href="{$product.tmbn_url}" title="{$product.product|escape}" class="thickbox" rel="[detailed]">
Code for TelaFirma's popup:
Code:
<a href="javascript:void(0)" onclick="window.open('{$xcart_web_dir}/product_images_popup.php?id={$images[image].imageid}','mywindow','width={$config.Appearance.popup_image_width},height={$p_y}')">
Hope someone could take a look at this.