hmm, unfortunately I can't seem to find that BIOS on my PC... I must have deleted it or something, but I did find a Beta BIOS in MSI's ftp site, which has EXACTLY the same changes. You can change the CPU Voltage & Change the Multiplier. You can download the BIOS here: http://www.mediafire.com/?o4t5mhomyzi
If you are interested in changing the bootscreen or modify some options, you can download AMI modding tools (MMTOOL v3.22 & AMIBCP v3.37) here: http://www.mediafire.com/?mnqwj2mmww2
I hope this helps. BTW, you should notice that this BIOS is for MS-7260 (MSI K9N Neo, PCB 1.0) only. It has nVIDIA chisets, so the CPU voltage will not be of much help, since nVIDIA uses completely different designs from that of Intel & AMD - nVIDIA's chipsets cannot overclock well, but they do have better latencies. Unfortunately real life performance depends on the actual clock rating & not the latency. You can try this BIOS, but I can't promise that it'll provide better overclocking. If you find that you can only overclock by 5%, then it's definitly better to leave the CPU on stock speed, setting the PLL's frequency higher than nVIDIA's chipset's locked frequency will make it unstable. Test the stability with IntelBurnTest (for AMD & Intel CPU's): http://downloads.guru3d.com/IntelBurnTest-v1.6-download-2047.html
*USE AT OWN RISK*