..::Hunt Groups::..

Hi, I'm trying to restrict access to several users to an specific service (some users can access only our cisco devices and some others only the juniper devices) as far as we know we can use huntgroups for that. The thing is that there's no information about them, only if you are working with a database. Right now we can't install a database to work with the radius server because we don't own it. Do you have a tutorial, book or something that can help us with that configuration?? Thanks in advance. Alfonso.