Extra Images addon on oscommerce store

I need to add "Extra Images" addon or "Additional_Images" or " Multi images extra" contribution on oscommerce (its total changed oscommerce is responsive). Bellow the image to look like this: https://6503217827ddd9cc.en.made-in-china.com/product/sFgAYKJDHzUV/China-China-Good-Quality-Air-Conditioner-C11000-C12200-Pure-99-99-Copper-Pipe.html
The addon can be downloaded here: https://old.oscommerce.com/lGsYA&extra-images
Latest complete version is the IMAGENS EXTRAS ADICIONADAS PELO NOME from 25th July 2007
The needed Tables and fields are already done in the DB see bellow example extra images are already assigned in the database on products_id=1177 see bellow attached images
Front is already done see attached image: Extra-images-front-products_id=1177.jpg
Admin is 25% done see attached image: Extra-images-admin-1.jpg
This is what I want on admin see attached image: Extra-images-admin-2.jpg

Skills and experience required:
- PhP programming language & MySql
- Strong understanding of osCommerce platform
I have already done the codding for the Front and half for Admin.