You can set up music sharing in the Music preferences. KavaTunes can create an alias in your webserver documents folder that points to your music folder. This allows you to stream music from your Mac running personal web sharing to the catalog.

If you get a 403 Forbidden error, then your web server may be configured to not follow aliases into your home folder. In this case, it is advisiable to move your music folder to a location outside of your home folder. You can tell iTunes which music folder to use in the Avanced preferences. Then restart KavaTunes and click the “Share Music…” button again to recreate the alias.