I have offers which provide banner ads that are in (.dat) format. Sometimes I would like to make "styling" changes to these images to better fit my project. I know that a (.dat) contains some additional info (maybe related to cookies or tracking) but I don't actually know how to modify the image and still maintain that added data in the modified image. I saw some things about using MATLAB but I don't know anything about it. Is there a way to modify the image and "resave" into (.dat) format that is relatively simple?