There's not much to say. Just add the card and have its windows 7 drivers on a floppy or a flash drive when you start windows installation. During the installation, there will be a spot where you need to select drives. If the RAID doesn't show up, load the drivers using appropriate option.
As for the RAID setup itself, you should just plug in the disks and the RAID card will have its own splash screen after main BIOS screen. On the screen, open RAID card settings and make a RAID 1 volume with your disks. Two disks will show up as one disk to operating systems.
Don't forget to set the RAID volume as bootable in your main bios!