Thanks Brad and Jon, I will try this on my D700 at home. I am in a hotel in Apex, NC for the two Nikonians' workshops this weekend, on Lighting and then Capture NX2(with a D2X, as the D700 was not listed in the equipment desired for attendees so brought something well known).
Another reason that I have shot low ISOs (remember when it was called ASA speeds for film?) is to print large with such small grain that it is spectacular, for example, I shot a sunrise with ASA 25 speed and my enlargement had no grain at all. I suppose low ISO speeds equal low ASA speeds(film) for effect. Debra