upgrading freeRADIUS

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