I think you can safely rule out the FS site for downloading anything to do with your mobo. The 'download' section of the FS site is backward in that it requires you to enter the serial number of the machine you are downloading for which is obviously no good if you want drivers for just a mobo.
My only advice to you is to use something like Driver Genius Pro, a trial version of which can be downloaded here:
I have used this program extensively and it seems to come up trumps on most occasions. It will allow you to download (albeit separately) drivers for your chipset, IDE controllers, Sound etc.
Let us know how you get on my friend.
A day without sunshine is like... night