This was all done in Corona, not mental ray.
Light settings I used default setup for the progressive render.
Did not use any ies files
have about 9 Corona Disk lights under the cabnets.
about 30 Corona sphere lights in the cabinet open glass areas. Used spheres because the disk and rectangle were coming in a a big shape that could not be hidden for some reason.
Two Rectangle lights above the stairs
One light in the hallway
2 lights on the back wall the scene shining on the back wall then filling the room.
There is a Corona Sun and sky being used.
One light about the Windows to help highlight the stools better.
My Candelas Values for the interior light might be too strong. I think I have the 3 main lights above the Island at about 6000 each.