Yes, you have to switch to RAID: Connect the non RAID drives to the Intel SATA 3 ports and the RAID ones to the Intel SATA 2.
Install the Intel SATA driver, then run this fix from Microsoft: http://support.microsoft.com/kb/922976
(it will modify the registry settings for msahci, iastor and iastorv for enabling the driver).
Restart and set SATA to RAID in BIOS. Then Ctrl+I to configure the RAID array. Leave two of the HDDs (including the one with Windows) as non-RAID.