In reply to David Coley:
don't know the exact camera but normally you can fire an off camera flash by...
1) a cable the connects to the camera hotshoe and then to the bottom of the flash... a hotshoe extension lead if you will
2) using the onboard flash to trigger the remote flash
3) using wireless triggers (basic ones you configure the flash manually, more advanced ones you can adjust everything in camera as if the flash were directly mounted)
do YongNuo make a trigger set that's compatable with her camera?