I'm not sure what you want to accomplish, but I managed to 'store' particle-positions (Whacko AVS II: The Source) by using a seedable random number generator. Because I reset the seed every frame, it always generates the same numbers. Of course, you don't have much control over it, but it's a start.
I almost have it. Actually, I think it looks pretty good the way it is but something is bugging me. I can't for the life of me figureout why the camera sometimes gets turned around. Could someone point me in the right direction?