Well, Just in case you do not yet have it working. I will assume you are intentionally running a raid setup. If you have been running raid in Vista, some things will have already been done.
The raid controller may have to be turned on in the bios.
When you boot, you may see a RAID setup screen which you might need to get into for setting your disks for a RAID array.
Windows should load the normal IDE SATA drivers
during the install and you will probably need to load the RAID matrix drivers when allowed. It probably needs an .inf file to look at, but I have never installed RAID drivers. Some manufacturers supply a download of just the drivers needed during an install for use like this.
You said the drives had been used, so you did not wipe them and need them re-initialized?
Have you changed any connectors on the motherboard? Some boards have two controllers. The fact you show no hard drives in the bios is not a good sign and if you have them plugged into the wrong controller, they may not work correctly.
Gregrocker meant AHCI, not IHCI, and the setting should be for an RAID/external controller, or for you primary drives where you set IDE/RAID/ACHI, depending on your motherboard choices.
If you can't get it to work, try just one drive at a time to see what happens. Then you would at least know if Win 7 was having problems with your hardware.