Help: Thumbnail gallery with pop-up slideshow

I’m trying to build a gallery that has thumbnail images and when a user clicks on a thumbnail a slideshow/lightbox pops up and is automatically set to that image. The user can then click through the slideshow or close the pop-up and go back to the thumbnails.
I found an xml slideshow that I want to use ( but I’m having trouble getting the swf to load into a movieclip.

Is there anyone who can help me?