Version 4.1 - 5.13 Scansafe functionality and components
In December 2009 Cisco acquired ScanSafe and kept it as a separate business unit. As of 12 September, 2012, the service is named Cisco Cloud Web Security, and the ScanSafe brand is being retired. [But of course it's on the blueprint and is still testable...]
For this section I would use Configuration Cisco Cloud Web Security documentation.
After reading that doc, I would then check out ScanSafe step by step configuration on the Cisco Support Community.
You may want to pay particular attention to the licensing details in the first link above.