Package Box Mock-Up | How to use? HD

Package Box Mock-Up Mock-Up here: http://graphicriver.net/item/package-box-mockup/7546731?ref=Eugene-design All my Mock-Ups here: http://graphicriver.net/collections/3659513-mock-ups?ref=Eugene-design My profile page: http://graphicriver.net/user/Eugene-design?ref=Eugene-design