Install grub on nvdia dmraid10 ?

Hi,
has anyone successfully installed grub on a nvidia dmraid10 ?

I have a setup of 4 160GB disks configured through bios to do raid10, 
made the partitions under WinXP with Partition Magic and I can access 
the /dev/mapper/nvidia_* partitions just fine from a livecd as they are 
correctly identified with dmraid -ay...

But every time I try to install grub on the root partition, it bombs out 
claiming "no such device"

I use the same grub config as is working on a server wich runs nvidia 
dmraid1, (with the /dev/mapper/nvidia_* changed to point to the actual 
device ofcourse)

Any suggestions?

kernel is 2.6.17.11 series, dmraid is 1.0.0-0.rc11, device-mapper is 
1.02.09, and grub is 0.97

--
Thomas