problem with samba and kerberos 5 to integrate freeradius with AD

Hi, i have been following this great guide http://wiki.freeradius.org/FreeRADIUS_Active_Directory_Integration_HOWTO on how to integrate freeradius with AD. I am getting confused about kerberos5. Do i have to additionally install krb5 from ports? Or maybe it should be on my system already after samba server installation? In any way (install krb5 or no, i tried both ways) i dont have the krb5.conf file on my system at all. Judging from the guide, it should be there without any krb5 installation procedure. I am running FreeBSD 7.1. I hope u guys can help me, becoz it feels like "no way out" at the moment. Thanks for ur time ;)