Thanks everyone for your posts! I just adjusted this for 4.2 version. The only difference is instead of
products[product] use
product
New "Replace with" for step 3 is:
<a class="thumbnail" href="product.php?productid={$product.productid}&a mp;cat={$cat}&page={$navigation_page}">
<span><img src="image.php?id={$product.productid}&type=P" /></span>
{include file="product_thumbnail.tpl" productid=$product.productid image_x=$product.tmbn_x|default:$config.Appearance .thumbnail_width image_y=$product.tmbn_y product=$product.product tmbn_url=$product.tmbn_url}</a>
Now, what would be nice is a way to offset it from position of mouse or something. The popup jumps somewhat strangely.
Take a look at my result here:
www.ijitsa.com