Dynamically Loading Pictures Into Slideshow?

I have a flash file that you can see at cascadedoor.net. how can I make it so that lets say the flash is set at ?button=3 - how can i make it load like a diferent slideshow. Basically I want it to load a different slideshow for each different button dynamically like from the ftp so that the pictures arent stored in the flash file so that the flash doesnt take a while to load? is there a tutorial on that stuff?