Your best option is to look at the POST screen when you start your system up (the one with the Energystar logo or whatever in the top corner). It will tell you what BIOS and version you're using. That's going to get you going in the right direction far easier than anybody here could with second hand information.
If you don't really know what you're doing, I'd advise leaving it well alone. You can really stuff things up if you try to flash the wrong BIOS version.
If you don't really know what you're doing, I'd advise leaving it well alone. You can really stuff things up if you try to flash the wrong BIOS version.