The parts for a new build are coming in. What I want to do is build a Raid5 Array for Music, Video and Data storage.

Hardware specs Here

Using 4 SAMSUNG SpinPoint T Series HD501LJ 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive - OEM

Install Vista Ultimate on a SATA drive ( Raptor).
Can I use 3 drives for the Array with 1 dirve (Connected) as a hot spare?

The GIGABYTE GA-P35-DQ6 supports SATA RAID 0/1/0+1/5 Matrix RAID.
North Bridge Intel P35
South Bridge Intel ICH9R

My plan is to Install the OS and then install the 4 drives. Would the Onboard Controller setup the Raid or would this be implimented in Windows? Either way, could I run the OS on one drive and the Raid5 Array on the 4 drives (same controller)?