You could also add them to the content Content Board description:
Firstly you need to store them as a PDF online. If you do not have the capability to do this, we can do it for you.
You then add them as a hyperlink to the 'description' or 'instructions of entry' using basic markdown code.
For more on photo contest features take a look at our tutorial video - https://www.youtube.com/watch?v=ADN6s2w_K-s&index=7&list=PLRNxWZk7MeRpQpOa2w_TNfMS_YBi6etwa