Please DO NOT use the Back Up Course feature in WebCT 6.0. Using that feature creates an enormous file which is automatically placed in your WebCT MyFiles area where it occupies a considerable amount of the system-wide file space available to you. Ultimately, you will not be able to upload any files to WebCT. Since the file is visible only to you, it's difficult for the Helpdesk to assist you in the event you are unable to upload files.
Additionally, the course site backup file has no use for you. You are not able to import a WebCT backup file to a new course site.