I managed to install a dual boot with WinXP Media Center and Windows Vista 
beta,  but I am unable to install a dual boot with WinXP Media Center in one 
partition and WinXP in another partition.  
When I try to install from the WinXP boot CD, I got the message: No Har Drive 
Found.
So then I got out and bought a USB floppy drive, loaded the RAID drivers from 
there during setup, but still fot the same message.
To get Vista installed, I did that while already booted from WinXP Media 
Center, targeting the other partition.  Thet worked fine, it didn't even ask 
for drivers.

Has anybody done this with more luck than me?

regards
Olav