I think this is a pretty basic designing problem, but I cant work it out for the life of me!

DISCLAIMER
I apologise in advance about the contents of these links. They are not for the shy or faint hearted! It's the nature of the beast of the products I'm selling I'm afraid. Cant give an example without posting it!

I've tried using Beyond Compare, but seems like they are almost completely different to me.

Pulling my hair out for hours trying to do this. Can anyone help?

This is the recommended product_info.php from More_Pics_6
<?php echo TITLE; ?>

on site preview -
http://ticklesticks.co.uk/product_in...roducts_id=118


This is the one I want to use it with - Pink Template from ToyIceBear
<?php echo TITLE; ?>

on site preview -
http://ticklesticks.co.uk/product_in...roducts_id=118

I dont want to edit the layout or anything, just swap the image previews from the first one, to the second one.
I've looked through loads of times, given myself severe eye strain and am nearly bald!

Help would be a lot more than appreciated!