The ASUS M2NPV-VM uses the standard Phoenix AwardBIOS with a few modifications for their uses including the blue screen. The board is targeted for the Digital Home initiative and the mainstream market, not towards the hardcore enthusiast, meaning that I don't expect the board to have a lot of overclocking options.

Battery
The overclocking options are in the Jumperfree area of the BIOS. The settings are FSB, DRAM voltage and CPU Multiplier. The FSB range goes from 200MHz-400MHz in 1MHz increments, DRAM multiplier goes from default to 1.9V and the CPU multiplier goes from 4X to the maximum that the CPU can go.
Overclocking of the ASUS M2NPV-VM was only able to overclock our 5000+ CPU to 210MHz, a 5% increase. To push the 5000+ further ASUS would have needed to include voltage options for the CPU at the very least and HT bus multiplier found on almost every other AMD board on the market. The M2NPV-VM is not designed for the enthusiast, so this is not surprising.
BIOS shots