Some codewriting JQUERY, NANOGALLERY, PHP, JS, HTML

I'm a Webdesigner with beginning programming skills. My business started 6 month ago and now I have my first "bigger" customer. It's an Event-Photographer. On his Tour-Bus on several events, we will run a simple Webserver Apache on RaspberryPi and on outsides computer will show a local webgallery, that is made with [login to view URL], so it's possible to easy display nearly Live taken pictures on the gallery. So far so good. What I found out is: nanogallery2 also provides the possibility to add pictures to a shopping cart. There is also an example but I'm a pure beginner and don't know how to implement this. What I need is not really a big thing for an expert: I will set up the nanogallery2 on a webserver. what you should do: write the needed code to make it possible to get a shopping cart function for the Event-Visitors. Finally there will be just a simple form that will be send to specified Emailadress with the adress of visitor and the content of his shopping cart (array of picturenames and Link to pictures), so, the fotographer himself receives an Email with links directly to the pictures he has to prepare.