Multiple webcams composite video streaming

I am relatively new to media foundation and I had just finished building my first single webcam streaming application using 'Developing Microsoft Media foundation Applications'. I have multiple dynamic webcam sources(the webcam number can change) and I need
to combine them using the video mixer to form a composite video stream much like how multiple CCTV live streaming working on one screen. And yet at the same time I can access individual video stream and highlight/bring in to focus/zoom in when the cursor is
hovering over to a particular video stream(event listening on video stream). 
I need a set of guidelines to work with media session, topology, video mixer and video presenter to implement the functionality above. Any help is greatly appreciated. I am not looking into directX to achieve the functionality above. I am into the native
media foundation architecture.

Hi,
Camera are WVC54GCA
Router is a WRT300N.
Like I stated earlier, one of these cams I can stream fine to my backberry storm,(Port 554 is forward to the ip address of the camera) but can't seem to configure the other for cell phone viewing.
All cameras can be viewed via http via computers.

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