Sorry, that won't work, given what seems to be the case from the steps of your procedure.
That is, it seems you did not install Win 7 on your SSD with the SATA mode set to RAID. You cannot simply change the SATA mode to RAID after an OS installation, the PC will not boot. Removing your OS drive and creating the RAID array without it is not a work around for that issue. Otherwise I don't understand why you would remove the SSD when creating a RAID array out of other drives, that won't affect it at all.
What SATA mode did you use when you installed Win 7, AHCI or IDE? Regardless, there is a method for changing to RAID mode after an OS installation, that requires a registry edit. Google on "change from AHCI to RAID", and you'll get many links to the procedure. Microsoft has a "hotfix" for this as well as I recall, which should appear among the hits of that search.
The other alternative is to reinstall Win 7 with the SATA mode set to RAID.
Assuming that you are able to change to RAID mode, you can then create the RAID 10 volume with the RAID utility available during POST, or if you install the Intel RAID driver in Windows, you can do that with the Intel Windows UI.
You can use the newer Intel Rapid Storage Technology (IRST) driver instead of the old Intel Matrix Storage Manager (IMSM) driver, with your H67 chipset. Any of the IRST drivers from Intel should work with your H67 chipset, and can be downloaded from Intel here, as well as different versions of IMSM:
Don't forget to select your OS version on that page, if only to reduce the size of the list.
The only possible problem when using an IRST driver, would be caused by the version of the Intel RAID Option ROM that is part of that PC's BIOS. Normally older Option ROMs work fine with newer driver versions, but if that PC has a very old one, you may need to use the IMSM driver. I doubt that will be the case, but you never know with OEM PCs sometimes...