How do I upgrade straight from a very old release to the latest one?
I'm trying to update my current Ubuntu 11.04 install to 12.04 while keeping the files, settings and installed applications but without having to go through updating to Ubuntu 11.10 as an intermediate step, that is, without using Ubuntu Update Manager.
I've read on the Internet that the LiveCD (and possibly LiveUSB too) installer offers an option to upgrade a version older than 11.10 in the installer. However, it is not available to me.
More specifically, I'm looking for the second option in this screenshot: http://4.bp.blogspot.com/_1QSDkzYY2vc/TWzh8Z786xI/AAAAAAAADNw/8lXqgCMgicY/s2000/ubuntu11.04-installer.png
...but with the version numbers changed to 12.04 (I swear I've seen a screenshot of the 12.04 Beta version installer with that option, but can't find it now). Has it been removed from the 12.04 LTS installer?
Or should I be using the alternate CD?
It's very important to me not to have to go through two Ubuntu versions as my internet connection is slow and downloading 11.10 first would be a waste of bandwidth as well as time (both for downloading and installation).