Curt- Either you'r a moron, or you forgot to put a 🙂.... 🙂
You could run any CPU at any MHz. The lower the MHz, the lower the voltage required, and the lower the heat output. So yes, if a CPU is acting flakey, turning it down could help.
I wonder if you could damage a CPU by running it at say, 166, when it's really a 550, and not turning the voltage down?