"VRay raw image file" can I change OPEN EXR settings here?

[biochemical_animations]

Is there a way to change the OPEN EXR settings when saving to VRay raw image file? I want to save render elements into a single EXR file for render sequences? I know when saving through max the EXR dialog comes up and asks 32 bit, or half float 16 bit, or RGB or RGBA, etc...but vray doesn't ask this?

I'm trying to save the image without the alpha.