Here is a link that explains how to do it.
http://www.logan.eclipse.co.uk/raid%20guide.htm
"Rich" <(E-Mail Removed)> wrote in message
news:048901c3d1ba$e5560d10$(E-Mail Removed)...
> My Asus A7V133 mb. with onboard raid shows my striped
> array on post and in xp explorer it shows a drive that is
> correct in size. When booting from the xp disk to set up
> my pc it doesn't find them nor will xp format the array
> which shows up in explorer. I have downloaded all xp
> upgrades and the drivers from Asus (which is not
> signed). Can some one help me?