Saving Region Renders per setup with Vray. How?

Topic name says it all I think. With Corona I had no such problem since any area/region render that was active in vfb was saved into a setup when “render settings” tab is fetched. But with Vray this doesn’t seem to work.

How do I do this? It’s a big part of my workflow, I really hope I don’t lose this ability/option.

So there’s no way to do that, seriously?