So what do you want to do? Do you want to transfer the data from the new harddrive to the old one?
If your old harddrive is corrupted and you want to install a fresh copy of Windows then just format it and install. Since the data is already backup on the new harddrive, why not just install the OS back on the old harddrive then plug the new harddrive as secondary to become a backup device. The OS will reside on the old harddrive and all your current data is on the new harddrive.