Membrane fusion

I have a question on membrane fusion.

http://tinypic.com/view.php?pic=fao4nk&s=6

During cell-cell fusion, proximity and localized membrane disruption are key events. Look at the accompanying picture and describe the flow of transport that must have occurred to allow formation of the final cell from the original cells and vesicles. For every fusion event, you must identify the proteins involved in trafficking and use them correctly.

HINT: Remember that fusion events will MAKE new sections in the target cell or vesicle

So, i know membrane-membrane recognition, proximity,Disruption of bilyar, i.e hemifusion, fully bilayer fusion are all requirements for fusion. So in the diagram, the t-snare and v-snare come closer together. I don't know how i would describe the flow of the transport to form the final cell.

Thanks