Remove the black square from a number of images on our website

Our website - www.seadan.com.au - has a number of products that have black squares around them (list of products that have this is attached) - we need someone to go to our website, search the code, find the product, save the image, remove the black box, keep the image the same size and save them back into a zipped folder under the SAME FILE NAME that they were downloaded as (from the website) and return to us.

We need this done ASAP (no later than tomorrow).