Thanks for the reply,
I am hoping to host the images with DFP.
I think the issue is when the URLs need to be replaced for the assets in the ad. For instance I need to be able to load this URL as one of my images that animates:
http://pagead2.googlesyndication.com/pagead/imgad?id=CICAgKCzgsvDHRABGAEoATIIx5G6vyQ1Mw1AxbH4tQU
Which as you can see is not inside of a folder that I can point the standard JS to.