Amends on existing code

I have an existing code which needs some modification but the actual seller is unresponsive to my requests and occasionally acts like he/she is least bothered. The project is pretty simple, a bunch of images run up on the screen and all I'd like to add to the existing code is for it to scroll automatically horizontally and with the help of some html buttons jump to certain locations in the scroll The code that I've purchased is located here: [login to view URL]