[CS3] Need Help With Scenes and Buttons

Hey new to here but would like your help.

Some info about my file. I have 5 scenes, the main scene has four pictures which are linked to the other four scenes. On each of the four scenes there is a animation that rotates images and are controlled by buttons

(image starts small on the left moves into the middle and gets bigger then moves to the right and gets small again, each button either moves it from right to left or left to right)

This is what i need to know and need help with, when the image is in the middle can you but a button it so that when a user hits that button the image that is in the middle will replace an image on the main scene?:yikes:

Plz help me if you can :confused:

Thanks
If you need to know anything else just ask and ill give you it