Simple Proxy setup

Hi, I am upgrading from an older server which uses version 1 quite happily. The setup is simple, upstream proxies talk to my FreeRadius which then talks to my Home server which is a really old DOS based product. I read other threads saying just to use realms, but I still get lost in the conf files. Getting over a major operation has left me feeling a bit foggy and I would really appreciate some assistance. Treat me like the village idiot, I don't mind, but I need this to be as simple as possible. Exactly what do I need in the clients, proxy and radiusd.conf files? Any help appreciated.