You will need 2 specific drivers along the lines you are talking about: one is an AMD and the other is a Microsoft Dual Core Hot Fixes (2 different files). You don't necessarily need to update your BIOS, only if your current version won't support dual core. I tend to follow the saying of leaving the BIOS if it's working fine. Maybe yours needs to be, but I was lucky as my ASUS board was already at a version to support it.
Other than those two patches and possibly your BIOS update, it's just as any other CPU upgrade... enjoy!