Well, if it does come to the point where you need to clear the CMOS, just remove the battery on the motherboard.
But, one thing I notice which is different to all my other systems I have overclocked with - the BIOS resets itself. That's right. Whenever I have gone too far, or overclocked something incorrectly, it makes a few beeps, then turns itself off. After a second or two, it turns back on again and voila. Back to default settings.
This happens usually all the time, however there have been a few occasions when it didn't work, and I had to manually reset the CMOS.