Horizontal Flash Site - Tween Class

I am trying to make a horizontal flash website in AS3. I have my navigation all set up and want it to Tween (slide) to the right for all of my 4 pages. My stage size is 2880w X 600h and I want my X to slide over in increments 720px to the right when the navigation is clicked. I also want it so when I test me SWF that I only see a 720 X 600 px area at a time.

So far I have looked up Tweener classes online and they seem very confusing and need to be stripped down a lot.

If you could give me so idea of how to do this that would be greatly appreciated.