Don't feel like you bothered anyone.  You made an honest attempt to find out if the lighting for the scene can be easily determined.  I would go with FrankT's suggestion to ask Vince Bagna directly over at RuntimeDNA.  It appears that there is no specific light set used, a generic setup.  One infinite light, one IBL, shadowcatcher for the ground shadows emulating the shadowing found in the background which appears to be a photo.  There might even be a fill light to the right.  If Poser 8 was used, then IDL may have been incorporated during the render.