With the help of a Dell technician I waded through the bios and so on to set up the 3rd HD in addition to the factory-installed RAID-0 array.  This new drive will be for archiving images and so on-- storage only.

As shipped from DELL the RAID (2 western dig. 250GB) has 3 partitions: a 100MB FAT32, a 4GB Ghost(?) FAT32, and a 462GB NTFS partition, which has the opsys (XP-Pro) and other applications on it.

I would like to partition the RAID-0 so I have the opsys and other applications (PhotoShopCS) in one partition (10GB), and the remaining partition for use as my scratch disk.  (I do not care about saving the Ghost partition that is used for quick system recovery) 

Disk Manager (XP-Pro) does not allow me to partition the RAID; all space is allocated as sent from the factory.

Is there a version of Partition Magic or other software that will allow me to re-allocate/re-partition this RAID-0?  Do I have to start all over, and wipe the RAID drives clean?

HELP!