If you go into the Photo section of your Actors Access account, you'll see tabs listing your AA Profile as well as your reps. Think of the tabs as folders for photos. It allows you to have different photos assigned to different reps.
When in a specific tab/folder, at the bottom you will see an "Available Photos" section. This will show you any photos that are in folders other than the one you're currently viewing. The plus symbol on each photo will allow you to copy that photo into the current folder.
Here is a helpful video tutorial that will show you how to manage your existing Actors Access photos: