Rest the gator board onto a flat surface and arrange the images in the order you like. Press thumbtacks in the corners of the images to securely hold them in place. Although the thumbtacks are visible they do mount and hold the pictures in place.
Place a piece of double-sided tape in each corner of the pictures. You do not need a large amount of tape while doing this. Press the picture firmly against the board and it sticks without much hassle.
Stick a piece of Velcro on the back of the image in the middle and place the other side of Velcro on the gator board where you want the image to be mounted. You can purchase Velcro with adhesive sides from most arts and craft stores. Press the Velcro of the image against the Velcro of the gator board and it sticks on. It also allows you to easily remove and change the order of the images.
Cover the back side of the photograph with a thin layer of rubber cement. Set the photo against the gator board and press it firmly down to make sure it adheres properly. Wait for the rubber cement to dry and rub off any excess with your finger. To permanently stick the pictures to the gator board, apply a thin layer of rubber cement to the gator board in addition to the picture and stick them together. This creates an extremely secure bond. You can not remove the image from the board without damaging one of the products.