I've been trying to do that, but I always get a message that says, "Warning - Unable to read file profile.icc". So far, I've used these commands:
>/usr/bin/xcalib -d :0 /usr/share/color/icc/BestRGB.icc
However, I think you have the right idea. I'll try to find out what I'm doing wrong.
Come to think of it, I used the NVIDIA Control Panel to calibrate my monitor in Windows, so I guess W7 is using a different display profile technically. Unfortunately, the Linux version of that control panel doesn't have that option.