Auto Selecting a Flash or HTML page

I have a client for whom I just created an entire Flash MX website. Now, they want to create and identical HTML site for the users that have dial up or do not want to install Flashplayer. They have a lot of very wealthy clients (individuals and companies) and you would think that would mean most would have high speed access. I am quickly learning that this is an incorrect assumption.

My suggestion to them was to create a simple HTML splash page which would allow the user to select either the Flash or HTML site. This was shot down and what they are looking for is the ability for the website to detect the Flashplayer (and possibly the access speed, yeah right) and send the user to the appropriate version of the site. Does this sound doable? I am not sure. If anyone has any info or suggestions, please offer them up.

Thanks,

TheMadPimp