FHFS isn't a replacement to HFS and it doesn't serve the same purpose. You can't use FHFS to manually add files to random directories and expect them to show up; it's meant as a portable SkyDrive type of product where any organization can easily set up a structured account-based file hosting website for all of its members, HFS is a bit more customizable because it's meant for more of a personal level and requires more management.