I can help out with your second point - moving artwork into other states.
Say you have an image in Page1, and you want to to be in Page1 and Page2.
Click on State2 - you will not see the image on the artboard, but you will see it represented in the Layers panel.
Click on the Visibility icon betside the image - make the "eyeball" appear.
Now the image will be in both states.