To be able to visualize all the images of the participants in a photo contest, we have created a dashboard which you can access from the participants list's webpage. Once you are logged on Cool Tabs, click on the icon "See participations" of your photo contest on the section 'Your content'. Once you do that, you will see an option in the left section of the page under the title "See all images". Click there.
It's also possible to download all the original size images clicking on that url. For that purpose, you'll need a plugin which downloads all the images located on a certain website. We use DownThemAll! for Firefox and Metalink Downloader for Chrome.