GA8KNXP: installed latest Si3112 driver & now cannot boot from RAID1.

Hi,

I have a GA-8KNXP (Rev1.0) mobo with Intel 2.8GHz cpu, 1GB RAM & WinXP
Pro.
There are 2 x 120GB Maxtor SATA Disks in RAID1 managed by the onboard
Silicon Image SI3112.
The RAID1 disk is also the boot disk.
There are also 2 x 120GB Maxtor SATA Disks in RAID0 manged by the
onboard IntelRAID.
The system was running well for the past few mth with the device
drivers that came with the mobo (i.e. Intel 975 series mohterboard
utlity cd (ver 1.1)).

However, last Dec-2003, I decided top download the 'latest' Si3112
drivers from Gigabyte Mobo support website. There were several drivers
from that download zip & I must have installed the wrong driver (i.e.
Si3112 SATA 1.0.0.44) whereas I should probably have installed Si3112R
1.0.0.33.

As a result, when the computer bootsup, it fails to recognise the
RAID1 disks & so cannot boot up at all. Safe Mode does not work.

Questions
=========
1. What is the correct version of SI3112 I should use?
2. How do I correct this problem given I cannot even boot up from the
PC? Can you provide a detailed step-by-step explanation? I have a lot
of data on all the RAID1 & RAID0 disks & do not want to have to
reformat the disks. Is there a simple way to reinstall the correct
version of Si3112 driver?

Your urgent help is most appreciated.
p.s. - I am using a 2nd computer to send this post message.

Thanks
Danny TAY
email: