Please add them to the Find A Grave website! Starting at the main page -
www.findagrave.com - click the "Add burial records" link on the right, then the "Family and Friends" link. When you get to the spot where you enter the cemetery, type in the cemetery name and location and click "Search for the cemetery". If not found, there will be a "click here to add a new cemetery" link.
Once each of the four memorials has been created, you can access them individually and add the photos you took. You can also add a brief biographical note to explain the circumstances of their deaths (either during the initial entry or when you're adding the photos).