Upgrading cf7mx to cf8 in a new intranet server

[kalder <kalderm@xxxxxxxxx>]

Dear all,
does someone explane me the better way to moving from cfmx7 to cf8 in a 
new hardware? My system is working in a intranet, and due some 
complicate network rules and custom java class, I'd like to do a deep 
test of the cf8 applications before to switch. Furthermore cfmx 7 reads 
some data directly from some instrumentations (with event by a http 
connections and "internal HD, aprox in real time) and I don't have to 
loose 1 bit of these data.
Thanks for your helps
kalder