WPA Guest support

Hi, I am interested in the fact that also the users who are not registered can visit a few sites. I would to know if the last stable version of freeradius support the "WPA Guest" feature for 802.1x captive portal implemented by Coova chilli. And if so what kinds of modifications I must do in the Freeradius configuration? I am already using Freeradius with WPA (PEAP) and all works fine. Thanks Best Regards,Josh