[AS2 CS3] - Loading an external .swf into my movie

I have a group of buttons that coordinate with eachother, and i want them to be there throughout the whole website with only a small rectangle that changes when a button is pressed. I have attached a picture of my layout, and i want to be able to import ‘.swf’ files into the empty grey rectangle.

I have no idea where to start and where to load my external swf’s, and the best i can do right now is to duplicate the scenes and use normal links, but that takes away the look of my buttons when switching from one page to another.

Anyone know how to make a pre-loader for the external swf’s also??