upgrading freeRADIUS

[vicky]

Hi list subscribers, hi list admins,

I'm running a freeRADIUS server version 0.8.1 (I know it is ancient) and 
I want to upgrade it to the latest version available. I have been trying 
to find some kind of procedure to upgrading but with no success. Does 
anyone know how to (in a fairly simple way) safely upgrade? The 
safetyness is very crucial, I cant risk overwriting my old configuration.

The old server is built with
/configure --prefix=/opt/freeradius
make
su
make install
/
Thanks to you all in advance and please notice that I'm not that of an 
expert on RADIUS...

Keep up the good work!

-- 
Vicky