Thanks for your quick response. Fwiw, I was able to find both the wallpaper and IES files by googling for them. Adding them makes a vast difference (improvement) in the output! There is also a missing map file used in texturing the floor (file6 in Hypershade). That file would be nice to have, as my attempt to hack a fix in for it broke the bump map connection somehow.

Thanks again,
Celia