Design Facebook Cover Pic

Need to create a Facebook Cov Pic. Size is 815 x 315 pixel. Will need a mockup. The banner will be a mozaic of pictures, with 10 squares. They have to equal dimensions, separated by thin white space between each sqaure ( see the "idea" in the EXAMPLE file ) You have to fill up the square with the 10 pic attached. The bottles have to photoshopped and make look really nice. For the bottles, you do not need to have the entire bottle within each square, you can do variation. We need to see the labels. However, for the pictures ( taptap, beach, citadelle, waterfall and mango ) you need to use the whole space within each square. I would appreciate any suggestions or ideas to make this banner look nicer : you can use your imagination too. The rendering has to be nice, good looking and appealing. See the MARLEY example of mozaic picture.