Fedora Users — How to re-install grub in a RAID 0 system

A system with 2 SATA 160 gb hard drive configured with RAID 0 by IntelMatrix Storage Manager, XP pre-installed (F6 key SATA driverinstallation), I installed FC6 and during installation, FC6 actuallydetected all partitions as what XP detected and finally completed theinstallation, up and ran for a while, both XP and FC6 seeing this RAIDconfigured volume as a single hard drive of 300gb (160gb x 2). Now theproblem is;

I put an Ubuntu CD for live demo but got stuck during the initial start,this actually screwed up the system booting and the Grub will not work,I use the FC6 DVD and booted into rescue mode trying to do thegrub-install, however I got message saying that can't find the BIOSdriver (Can't remember exactly), I remember that during the installationof FC6, Grub was installed in /dev/mapping/xxxxxxxxxxxx something likethat, but now when I do fdisk -l, I only can see that /dev/sda1 and/dev/sdb1 (If I remember correctly or close enough), grub-install/dev/sda will result "Can't find BIOS driver" .Meantime, XP is up and running again after fix, but how to do thegrub-install to put the grub back into system as boot