cut and paste some javascript and html

I'm building a tumblr theme and I would like 'photoset' posts to display like this (with the arrows and the slideshow effect): [login to view URL] By default, 'photoset' posts are displayed like this: [login to view URL] Basically all I want is for someone to transfer the photoset code, javascript etc used in this theme: [login to view URL] to this theme: [login to view URL] without any javascript conflicts and of course keeping the current "small" column width. I'd also like the arrows to appear 'on: hover' inside the image as opposed to the outside of the image! The photoset code (to get that slideshow effect with the arrows) is most likely in here: [login to view URL] But I have very little knowledge when it comes to js, hence the reason why I need help asap!