Sub-Routing to a Specific Point in Flash File

[dynamicrob]

I have a link from an external page that I want to direct to a specific point (page) within a Flash site. No matter where you navigate to within that Flash site, the URL stays the same, so there is no direct path to link to like there is in HTML. How do I link to a specific page within that Flash site, when the URL is the same no matter what page I'm on?
Thanks.