Falling particles that settle into a pile

I’m animating a torn sack that will deflate as the beans inside of it spill out and pile on the ground. The sack I’m animating frame-by-frame, so the problem is the beans-- I can’t imagine animating them one by one, but I know nothing about actionscript and the few tutorials I’ve found online don’t address what I need to do; worse, they seem hopelessly complex.

If anyone has any suggestions, I’d be much obliged.