Vista - Proper way to show images along the bottom pane of form?

I am working on a Quality Control form for a print shop. I have a folder
with thumbnails .png files for each image my printer is going to create. I
have split the xaml form into 80% top section and 20% lower with a docking
panel. In the 20% section I want to show every thumbnail image I have for
this doc. 1 to n pages. In the mouseover or the click event I wanted to
show the larger version png file in the 80% section.

I have the path to the folder for the images for both thumbnail as well as
larger size.

How do I fill the lower container of images?

What is the property to catch when the mouseover event fires letting me know
what the file name of the image I want to use for the larger showing?

TIA