Configuring RAID5 on a new Dell Poweredge 2950 server

I have an Dell Poweredge 2950 server with four 146GB, SAS, 3.5-inch 10K RPM Hard Drives. I have a PERC 5/i, x6 Backplane Integrated Controller Card also. Iam want to use this server as my Windows SBS 2003 Domain Controller.

Please friends let me know whats the best way to install Windows SBS 2003 and configure Raid 5.