Hi,
find the update script that is floating around on the forums.
No. Update script is easy to use but you will never get rid of that sometimes very special upgrades and contribs any more. And you need to, if you
a) change to 6.5 or even 7.x
b) change hardware/server.
I had some troubles after using update-script. I had to break one server down and do a complete reinstallation.