t61p t9300 undervolt and maybe overclock?

I just successfully undervolted my T61p t9300 to .9750 volts.
It runs incredibly cooler now. and plugged it into my kill a watt at max cpu
after - .79 amps 49 watts
before - .90 amps 56 watts
Should extend battery life.

Anyways only "problem: is that RightMark doesn't currently support half steps, ie 12.5x So the computer currently maxes out at 12x which is 2.4 gigahertz instead of 2.5.

My question is since I have so much leeway with the voltage, if I turn the voltage back up could I change the top step to 13x and run at 2.6 gigahertz like a t9500?
And if so how do I accomplish this?

For those who might want to give this a try here is the guide I used http://forum.notebookreview.com/showthread.php?t=235824

 

On a desktop ud use clockgen and setFSB, but that doesnt seem to work for laptops.
Id also rly like to know how one can overclock the CPU

 

Regardless of what the multipliers mean, it absolutely does run at 2.5 GHz at the 12x multiplier. Measure it yourself. I'm referring to the core clock, not the throttle.