How is this done!

I want to have the navigation and display of my work to be something similar to what it is on HERE I am a super beginner at flash and am not really sure how to execute what I want to do, people tell me its xml, others say its an animation, others say its seperate buttons for each projects and others tell me its one file.

If someone could shine some light on this and tell me what the easiest way to execute this or places I could find some sample or ideas.

Thank you for the help guys, I really appreciatte it.