In some case is useful to vertical place the additional images. Now you can enjoy this features for free.
You can adjust the column width to your preference right in the .xml file. If there are many additional images, they are split into 2 or 3 columns.
ocmod
Tested on version 3.0.3.x
Demo
If you need some adjustment, email me.
Login and write down your comment.
Login my OpenCart Account