Inserting HREFs/links in the FlashXML photogallery

Firstly, thank you for these incredible tutorials.

My question involves this tutorial:

I want to make the images click through to a link. I have a layer that includes a button of the same area as the images - and I presume whatever URL I want to assign to that button [different ones for each image] should be included in the XML, but I’m not sure how this is done.