Screw regular CnQ, I was never able to get it to work with my Neo2 (probably just the mobo, but still). Get RMClock. It's a freeware utility that does the same thing as CnQ with a few extra bells and whistles. It also works much better for OCing, because you can specify voltage and mult for both min and max cases. After that, it works just like CnQ and throttles up/down your CPU (including intermediate states, another nice touch) with load, and you can adjust the aggressiveness for power v. performance. I love it, and I've never had any problems.
I did have a little trouble getting the new 2.0 version working, but I managed to find the older 1.4 which is great. Again, that's probably just some quirk with my particular setup.