I asked this question in a very old thread (2008) under the add-ons/contributions category, and that may be the reason no one has found my post. I don’t know if I have the ability to delete that post, but just trying to get my question into the correct category.
I would like to have the main image thumb (at the top left of the product page) appear alongside the additional images that are positioned at the bottom of the product page.
The poster in the other thread wrote:
Just solved this problem on my own. Thought that someone else could use the information.
PHP Code:
$images_array[] = substr_replace($products_image_match,'',-1).$products_image_extension;

I added this snippet to line 58 before the sizeof and sort of the images_array of the includes/YOUR_TEMPLATE_NAME/additional_images.php

That should call the correct image and give you a thumbnail of your main image along with the additional images.
I’m not adept at knowing where to change files or the specific code to enter. I have a gloss black template, so my files may be sorted a little differently than the person who posted the code.

My additional images.php file has:

Line 31 to Line 33:
if (!defined('IMAGE_ADDITIONAL_DISPLAY_LINK_EVEN_WHEN_NO_LARGE')) define('IMAGE_ADDITIONAL_DISPLAY_LINK_EVEN_WHEN_NO_LARGE','Yes');

$images_array = array();

Line 119 to 123
: if (sizeof($images_array)) {

sort($images_array);

Would either of these be correct for the placement of the code? Would I just add the EXACT code entered above, directly above Line 119? As I am new to coding, guidance in what to enter and where would be a huge help.