Loading SATA drivers

> I am attempting to install Vista onto a second partition of my main harddrive.
>
> During the install process (running through XP), I am told that I need to
> load drivers for my harddrive or it will not work. I downloaded the newest
> SATA drivers for my harddrive (SI3112 v.1.0.56.1), and have put them in the
> root directory of a USB flashdrive that I have. Now, when I try to click the
> load drivers button, the installation says:
>
> "No device drivers were found. Make sure that the installation media
> contains the correct drivers, and then click Retry."
>
> I'm fairly sure my drivers should work, but just to double check, here are
> the files that I am placing on the flashdrive:
>
> si3112r.cat
> Si3112r.inf
> Si3112r.sys
> SiiSupp.vxd
> SilSupp.cpl
> SiWinAcc.sys
> TxtSetup.oem
> readme.txt
>
> Has anyone had any similar problems? Is it maybe my stupidity coming into
> play? Have I missed something important?