Overclocking an extreme edition CPU is extremely easy!
1. Increase the multiplier until you get the frequency desired.
2. Set all the voltages except core voltage to the typical(TYP) values shown in the Electrical specification(page 22) of its datasheet
3. Increase the core voltage until your system can stabilize in Prime95
p.s. 965's datasheet can be downloaded at http://www.intel.com/design/corei7ee/documentation.htm