It's a bit big for a divider, more suitable for a banner. I will place it in your project so you can see for yourself.
1) What I do is, I go to the Photos and Documents for Erica Howton of your project.
2) Click on the image you want to use in your project. The bracelet pic in this case
3) Rightclick on the pic and select: Copy image URL
4) Go back to the main project page and open the Edit box and paste the image URL.
5) Get rid off the http: and enclose the remains of the URL in {{ .. }}
it will then look like this:
{{//media.geni.com/p13/43/a6/ec/88/5344483e1a9889d9/braided_gold_mesh_bracelet_large.jpg?hash=11af36361d96faf2eb7f578b165b1131e662515c1e8ecee33466b488a6433c4e.1762502399}}
6) Jobs done :)
As you can see in your project, the image doesn't match the right width, which should be 600 pixels.
I suggest you read through my 10 steps at my (David) Banner project at:
http://www.geni.com/projects/David-BANNER/26445