To load NearUniWB into your D200, go into gallery, download by right clicking, copy _DSC0001 to card, and load custom NearUniWB white balance from the file into one of the presets d1-d4.
Thanks to Julia Borg for supplying the initial NearUniWB settings file.
(The image is the gray background of capture NX on a monitor that is not too well calibrated...)