BIOS Flashing doesn't magically unlock certain features...infact someone was basically wondering this in a thread earlier. Your board has to already come with those options. Custom BIOS's tend to add stability in some cases or like with the first introduction of the .09u cores from AMD a BIOS flash would let the motherboard recognize those processors. Other than that, if your board doesn't have it, a BIOS flash will not just unlock features you otherwise didn't have.