upgrading freeRADIUS

[vicky]

Hi list subscribers, hi list admins, (again)

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