here is your virtual appliance of free radius including php, mysql, with AAA, its very easy to manage through gui. no need to mess up with conf files. and its free!!

http://www.vmware.com/appliances/directory/69328

following is the image of the webgui..

http://yfrog.com/1050047585j

http://img36.imageshack.us/img36/8265/50047585.jpg