Sorry about the delay, I didn’t see your post until just now.
There’s no way to get a preview like that with the addon in its current state, but I’m going to experiment to see if I can get something like working. I don’t think there’s a way to directly modify particle movement through Python but force fields should work (if not very efficiently for performance). Barring that, a custom Blender build may do it, though.
Not sure if anything usable will come out of it, but I’ll definitely try 