yeah, unfortunately it's not easy for us color perfectionists to find the right settings for the Cube...so far, the only thing i've been able to use was in Resident Evil...the black border around the picture could be used for pure black, while pure white is kinda hard...in Jill's scenario, if you examine the combat knife in the menu and turn it so that it's reflecting the light source, a good part of it will be pure white.
if you'll go to the 'monitor adjustment' in the options menu, you'll have a grayscale with some midtones and several columns of colors with corresponding intensity...it's no SMPTE color bars but it's a workable solution for adjusting saturation.
if you use DScaler with a Flyvideo 2000 then i can give you my settings (which i'm going to perfect this afternoon).