Running water.. <waterfalls>

how do you make a running water on a waterfall…more like a running water on a raging river…coz i have a waterfall pic with stones hanging out <or more like extruding>…so the water should flow depending on the stones…

i just thought that it would be better to use AS for it…the prob is, i dont know much about it…so can anyone help me…thanks so much …

alright, i think i found what ive been looking for, just dont know how to do it…

how do you the random thing that appears on the stream in its background, coz its like curving white things appearing randomly…
does anyone know? pls help…thnks so much :smiley:
http://www.pgiinteractive.com/flash_launch.html