If you find the mentioned motherboard on asus site, then you probably could.
But I think that a8ne-fm is a oem product, i.e. it's supported by retailer, which is F-S in our case. Bioses from other asus MB's may not be supported by this product. So, I would say that you cannot put in any other bios, except the one, which is available on F-S website for downloading by your computer's S/N.
I't like in my case of Scaleo Pa with M2R-FVM motherboard. It's very similar to asus original m2r32-mvp, but in other hand it's very different. OEM versions, used by F-S, seems to be a cut versions.
So, if you want to overclock, buy a computer for overclocking, but not a OEM brand.
I was able to overclock mine with ClockGen (http://www.cpuid.com/clockgen.php
) for FSB and SysTool (http://www.techpowerup.com/systool/
) for memory latencies, also I used ATITool (http://www.techpowerup.com/systool/
) for overclocking my Nvidia graphics.
The only thing that I was able to rise FSB only to 214MHz (from default 200MHz) and the system became unstable, which disturbed me. The cause, I saw that the motherboard has very limited power management and is not able to set 2-2.1V for memory.
Also remember about lack of cooling capabilities of F-S cases, which many people struggle of.
Also remember that overclocking can lead to loosing warranty.