Hey !
I don’t know the plugin, but I’m playing a bit with animations.
Here is a very small introduction with example definition I posted a few time ago…
So you would need to separate the frame sets into domaine, and make the time line go through all of them (?) and what goes out of each is a vector (for each pieces).
I don’t know if it’s possible because I don’t know the vRay plugin, but might worth a try 
By the way, is the plugin good? We don’t ear much of it, but judging but your screen shot, it looks nice ! Do you have a video example you’d like to share? (result) That would be much appreciated