A series of simple questions for WPF.

Hello. I'm trying to build a simple WPF project, which is turning out to be not so simple. I've decided to start from scratch after building a demo AS3 system in Flash. Basically, I need to load in a series of thumbnails from a folder (not using XML as the contents will change regularly and I wont have access to change the XML file) and fill either a stackpanel or wrap panel with those thumbnails. I'd want a little space between each thumb, I'm not sure which panel would be best for this? Once that is done, the panel has to move left and right with the mouse as there will be hundreds of thumbs, the panel will be much wider than the screen. Then, if you click on a thumb it will load the high res image, or video. Once you tap the high res image/video, it will go back to the start. So, my question is for filling a panel up from a folder with images, which panel would you suggest? Thank you. :)