Done, done, and done. 8)
Jedi, generally speaking, the voltages that need to be increased for stability on the DS3 are vCore and vDimm. vMCH can be +0.1v, but it depends on how hardcore you're going.
But 98% of the time it's vcore and vdimm. These C2D chips have huge headroom, so it depends if your RAM can take the speed and the juice. For example, my old OCZ Platinums ran great at 4-4-4-15 at 800mhz. But getting them past 860 was not good.....they just didn't wanna push, even with looser timings. So some RAM can go high, some can't. Those of you with a 4300 or 6600 won't have to worry because of the higher multiplier. Those of you with a 6300 will need good RAM to get really high overclocks though.
Generally around 3.0ghz, you'll need around 1.35 vcore and +0.1v or +0.2v vdimm, depending on the RAM. There are exceptions, but those settings should work. vMCH could go +0.1v maybe. vFSB, vPCI stay stock. So it's mostly the vcore and then vdimm that need the juice.
Lemme know if any questions, check your Inboxes.