Guys, after reading this forum, I'm totally confused!!!!

We have been running NW 5 and BMAS (Radius 3.24) for authentication and
authorisation of remote users with authentication being 'proxied' off to
a SecureID ACE server.
Now, we are in the process of upgrading to NW 6.5, but after looking
through the documentation and reading this forum, I have no idea how to
implement the same solution!
Can someone please put me on the right track?

Regards,
Kevin Adam.