Hi again Allan,
Just letting you know that your answers about breaking my RAID1 were correct.
After using the option to "Reset Disks to Non-RAID", the RAID volume was automatically gone and the two disks then appear as just two normal hard drives, both with bootable Win7 left intact. Nothing else needed to be done, except decide which drive you wanted to keep bootable Win7 on, while removing the other drive to repurpose.
Important point to remember is leave your BIOS hard disk configuration as RAID. Do NOT change it to IDE or AHCI or you will have to reinstall the operating system and your applications & data.
I even interchanged the two disks to verify either one could be used for booting...and it worked like nothing had changed.
Thanks and have a good weekend.