A8V-E Deluxe - Just reformated

Hi, I just reformated last night. I have XP Home Edition (SP2 + all updates). I can't figure out how to get many of the drivers for my motherboard (has a lot of onboard components) to work. I've downloaded a lot of drivers from the ASUS website but don't know how to install them. I downloaded ASUS Update but don't really know how to use it. I'm not sure if updating my BIOS will bring my sound back, etc. Any help is appreciated.

I realize this is a very open ended inquiry. Specifically I would like to get my sound back. Under device manager the "multimedia device" shows a yellow question mark.

The ASUS Update is only for updating the BIOS. You should only have to click on the drivers you downloaded, they should be .exe files, and they should install