That's what I did too. I wired the 4 VID pins to ground so it would default at 2.05V. By doing so, I also got Vcore steps at 2.1, 2.2, 2.3 and 2.4V in the BIOS, but none of them would work (no post) except the 2.05V step.
I then looked at the Vcore regulator chip of the mobo: HIP6021 (the VP6 might use the same one). The datasheet says there are 5 VID pins while the CPU drives only 4 of them. The 5th one was grounded, and it is actually the one that enables voltage steps above 2.05V.
Your board behaves very much like mine. I finished the mod tonight. I actually had to lift VID0, VID2, VID3 and VID4, so that I would get 2.2V according to the HIP6021 datasheet (VID=11101).
I wanted to copy a screen shoot of MBM to show you. How can I attach a gif file to a post?
BTW, I updated my sig with my new voltage.
