add some joomla articles with a gallery

This is a very simple project, no programming necessarily. I need to add in an image gallery that is already installed on the server. Just a duplicated one to show other images. I will provide a lay out and how the images should look. Lightbox and the image gallery plugin is already up and running. The plugin installed lets you drag and drop in images and it automatically creates the thumbnails. Please use this method and explain to me how you implemented it when its finished. $30