100 gigs down the drain maybe?????

I hope someone can help otherwise its 100 gigs down the drain
I have a p4 2.0, 512 ddr with 2 seagate st360021a 60 gig drives in a raid striped array.the motherboard is a msi 845 ultra "ms-6398"

after a power loss system will not reboot to xp,miising or corrupt windows\system32\config\system.
on reboot shows raid mbfasttrak133 lite 2.00.1.22 loaded,
i then boot from cd to try to repair windows, i press f6 to load the raid drivers,but the version i have on disk is 2.00.0.21. this loads successfully.i go to the repair option by pressing r, it finds the windows dir,it shows
1: c:\windows. I press 1 then enter, the computer now freezes and will not go any further. I have also tried reinstalling xp again. But the computer freezes whilst searching for the previous version of windows.
I am assuming there is a mismatch with the raid driver build, the one installed on the computer is build 22 and the one i install with f6 is build 21.
I cannot find build 22 anywhere so how do i change the computer version back to build 22.
Any help will be much appreciated i do not want to lose 100 gigs of info

virgil