Moving image inside a header

Hello,

I want to create a web header for my hp in Flash. The header should display 5 images (one after the other) and the image should move very slightly (or even zoom) and after a short period the next image should appear (maybe with a transition effect, like blur).

My question is now, how will this affect the webpage performance? Since this header will be displayed on every page. Will this blur effect cost extra ressources?

Does this has a special name? Or do there extist predefined applets?

Thanks for any help!