i'd start at 1.4-1.45 and see how hot it gets and how high it will go on that. then work your way down to a comfortable level. kind of backwards from the mainstream school of overclocking, but it has always worked better for me. start high, end low. kind of like some of my younger days in the bar lol.
yes, just put your voltage to 1.4-1.45 and when you reach your desired overclock, go down slowly with the voltage until your happy, i wouldnt run 1.45 daily through a chip so.
put 1.4v-1.45v in the chip with the desired overclock, say 3.4ghz, if its stable, take the voltage down a bit more, and if thats voltage carry on taking the voltage down..
A screen shot and your settings in bios would be helpful
If you don't feel like waiting a whole day to stability test just use this and run 10 passes IntelBurnTest v1.6 download from Guru3D.com
Hmm so what should I up the ppl voltage 2 and ima start OCing once my vista OS arrives but I will take a screenshot of my bios setting for u guys hopefully I can get it to 3.2ghz stable I would be very happy.