Showing images in WPF

Question

Hello everyone, 
I have a WPF program in which I'm showing 128 images, and for each, I need to a) play an audio file and b) have an arrow point to a certain part of the picture. Because each pictures scale and size is different, the arrow pointer needs to be customized to each picture. That's 512 pictures I need to add arrows to. Then I can simply change the picture in the space of showing each, and it will have the arrow burned into the picture. 

My question is...is there any other / easier way to do this? Editing 512 pictures to include arrows in them is not my idea of a good time. Am I thinking about this wrong? 
Thanks, Dave