KM266-8235 is the chipset.
First link will give you the option to install an activeX control. The activeX will profile your hardware and present the downloads tailored to your board. It's the most reliable option. Click the black button.
Second link shows the resulting downloads available for the MS-6738. I know it says "KM2M Combo-L", but search the site and this is what you get.
You should see:
VIA 10/100 LAN Drivers
Realtek ALC Series AC97 Audio Driver
VIA Chipset 4in1 Drivers
VIA USB2.0 Drivers
VIAŽ KM266 & P4M266A VGA Drivers
VIA USB2.0 Patch (Under WinXP+SP1)
I would down them all, excepting the last one if you are at SP2 level.
Time is no problem

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