Adding space to drives (RAID5)

I recently added another scsi drive to my RAID 5 array. I used the expansion tool through adaptec which allows me to add the additional drive while preventing me from losing all data. After I rebooted, I now see the additional space as unallocatedin the array. I currenly have a C and D drive evenly split (18GB each) I’d like to take the unallocated space and add to both current drives.

Can this be done in W2k? Do I need something like volume maanger to do this? Are there any other methods? It’s not in the budget to purchase volume manager.

Thanks