Replacing header image with Flash file

I’m trying to replace the header image on my client’s site with a flash file and can’t seem to find the right combination of imbed/object tags to modify the css with.

The website is https://www.glikbarglaw.com

The css currently references the header image like this:

#submenu-bg { background: transparent url(img/portland-corporate-law-business-litigation.png) 0 0px repeat-x; height: 240px; width: 985px; }

The flash file is here: https://glikbarglaw.com/wp-content/themes/glikbarg-law/img/glikbarglawheader.swf

I know that I can’t just drop in the .swf file in place of the .png file—I need to add some kind of object or embed code with it, I just don’t know what that needs to look like.

Please help!