nVidia Color Saturation Adjustment??

Both the nVidia and Riva Tuner control programs offer several adjustments such as Brightness, Contrast, Gamma and Digital Vibrance. However, there is no specific color saturation adjustment. Digital vibrance might fill that role but its default position is also its minimum setting.I have been taking a close look at my several gigabytes of photo scenery and have seen obvious needs to both increase and and reduce color saturation. However, with the two control programs I have mentioned the adjustments are not adequate to achieve a good level of color. So, does anyone know of a way to specifically adjust color saturation for a nVidia 8500 256mb card?Regards,Dick BoleyA PC, an LCD, speakers, CH yoke