Making GRUB see software RAID 0 under Ubuntu 10.10 LiveCD?

[iono sphere]

I have installed Ubuntu 10.10 on a software RAID 0. I wiped out the whole two hard disks and install it as a single partition. So one partition for the whole system. However, I need to install Windows back, so I use the partition program GParted (use kpartx to allow it to see RAID 0) to split things up. For better indication of the partition condition, please refer to GParted.png in the attachment of this mail. The partition /dev/mapper/nvidia_acajefec1 is of course Ubuntu 10.10, and /dev/mapper/nvidia_acajefec3 is Windows 7. 

Windows 7, once installed, will wipe GRUB's setting away and make itself the only OS bootable. So I need a way to restore GRUB.

I tried to follow the instruction around the Internet, and I cannot restore GRUB because GRUB can't find the disk. Here are what I did in the console:

address@hidden:~$ grub
Probing devices to guess BIOS drives. This may take a long time.

       [ Minimal BASH-like line editing is supported.   For
         the   first   word,  TAB  lists  possible  command
         completions.  Anywhere else TAB lists the possible
         completions of a device/filename. ]
grub> root (hd0,0)
root (hd0,0)

Error 21: Selected disk does not exist
grub> find (hd0,0)
find (hd0,0)

Error 15: File not found
grub> find /boot/grub/stage1
find /boot/grub/stage1

Error 15: File not found
grub> find /dev/mapper/nvidia_acajefec1
find /dev/mapper/nvidia_acajefec1

Error 15: File not found

So in this case, is there a way to make GRUB see software RAID 0? GParted can see it with kpartx, so what about GRUB?

Thank you in advance.

GParted.png
Description: PNG image