Some help with images loaded into movie clips

I have a series of images that are loaded from an xml file into some movieclips, which are inside other movieclips on the stage. A quick diagram to help explain:

Main Movie Clip ----> Inner Movie Clip —> Image

So I have several of these movie clips on the stage and I would link to find out which image is in the movie clip that the user currently has their mouse on. I feel like I’m close to getting it but it never works. So any help would be much appreciated! If I haven’t given enough info please let me know and I’ll fill in the holes. Thanks in advance!