You want the main SSD boot drive on the first Intel port (SATA3_0), and the DVD on the last Intel port SATA2_5)
The RAID array can go anywhere in the middle, but it may be best to put it on SATA2_2, 3 and 4, IE the 2, 3, and 4th SATA2 ports, with the DVD on the last one. You can put one of those disks on a 6Gb/s port, but it's probably best to go ahead and use them all on the 3Gb/s ports.
BIOS settings would be as follows
Integrated Peripherals
Intel Controller (White/Black Ports - top of the BIOS)
eXtreme Hard Drive (Intel ICH10R Chipset) ........................ Disabled
ICH SATA Control Mode (Intel ICH10R Chipset) ..................... RAID
SATA Port0-3 Native Mode (Intel ICH10R South Bridge) ............. Either
If you are installing windows on the SSD, it may be best for you to install with only the SSD connected, in RAID mode. No drives are needed during the install, but you can install the latest Intel F6 Pre-install RAID drivers during the install if you want. Then once windows is installed connect your RAID array
You may or may not be able to move the RAID 5 array to this boards controller, depending on what board it previously was on. That's if it contains data already I mean, if it's going to be a new RAID 5 then you should have no problems building it before or after windows install using the above settings and port info.