RAID 5 in win2000 advanced server

I have four 20gb disks on a scsi controller. You need the hd to be dynamic to create a RAID array in win2000. Win2000 defaults to a basic disc. So the primary partition is a basic disc (system). Upgraded to dynamic, and win2000 changed partitionto dynamic, simple volume, and 8mb of unallocated space. How do I create a RAID 5 array with all four hd’s? Windows 2000 Server by Minasi is a bit fuzzy in this area. Any feedback would be appreciated.