How do I configure the "Housekeeping" DFC feature to delete downloaded files from checked out XML and Virtual Documents?

You can configure the "Housekeeping" feature by adding the string value "NumberOfDays" to the HKEY_LOCAL_MACHINE\Software\Documentum\Common\Housekeeping key. You may also have to create the "Housekeeping" key as well. This value basically tells DFC to clean up the files every X number of days.