You mean he wants the entire site to be flash only? The best thing to do here is to duplicate all of the Flash content within static HTML pages. Then, at the bottom of the homepage containing the Flash object, create a link to "Non-Flash Version". Let Googlebot loose on your non-flash version and you'll be set. You'll make your client happy because he'll like the spiffy animation that Flash provides, you'll make googlebot happy, and you'll make the content accessible to people without Flash installed in their web browsers.