This is a bit complex to explain, because you would need to integrate SWFaddress into your own flash to handle this ...
http://www.asual.com/swfaddress/
Your own flash would have to integrate the SWFAddress, and then control the GotoAndStop based on the SWFAddress URL/parameters ...
Top be honest, I don't feel entirely comofortable with swfaddress myself, so I might not be able to help. This was basically integrating a 3rd party resource into Imagevue.