Survey Script tools one provides a survey of the your existing csu installation. This report is published in html so you can read it and confirm that it contains no sensitivity data. Once happy with this you can then send the html file to Cisco for analysis. The survey tool allows us to decide how easily it will be for you to migrate.
The second tool is the actual migration tool, this tool will analyse your installation and then if necessary prompt you to answer some questions in order for the migration process to work.