Load XML photogallery from buttons

I have an idea for a photo gallery, or rather many combined into one.
On the first frame I’d like to have various buttons which will load individual XML files and start the associated photogallery - is this possible. Any hints/tips how I would go about such a thing?

For example I’d have a map of the world on the first frame, the user clicks the UK and the uk.xml file is loaded in and thus begins a photo gallery of my home town or something. Does this sound doable?

Or maybe the user could click each button and it loads a new SWF Gallery. Would that be easier do you think?

Thanks for any advice/tips or files anyone can provide to help this lowly designer out.