Looks much better now, the lighting seems correct to me.  

Some radiosity could help too, reflection of the sky in the windows would
also be quite effective IMO.  I would also suggest some dirt, but your
employer probably would not agree :-)

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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