Simple Flash Site

I would like to set my site up to work with flash because there will be a lot of pages if I did it in html. I still plan to make an alternate html version for those who dont have flash, but for now I think it would be best to use flash. An image of the site is linked at the end of this post. I want to make the site work where you can click on the links that say main, design, photo, etc. And the white box below the brown line changes to those sites. As you can see, the thumbnails will also work as links that change the white space below them. I understand I will have to build a flash file, within a flash file, within a flash file for that. If I am wrong correct me. But I dont know how to code the action script. Please do not assume I know anything about flash. Talk to me like I am 5. Seriously.