flash & seo

I have a client who has a 100% flash site. They are now interested in improving their Search Rank so changes need to be made.
There requirements are not to rank for competitive key phrases but rather appear at the top of the results for their own brand (this should'nt be too difficult).
They have about 2% textual content on their site so building an alternative (x)html & css version seems pointless.

My question: Can the front page (where the flash object appears) alone be optimized?

Would this be beneficial to ranking? Or are multiple pages (split the flash file) required to make headway with onsite seo?

Thanks for any advice

You can do some stuff, but IIRC google only reads flash files (.swf) for links.