What I always did since 3.23 upwards is new installation and import.
My tecnique allows me to install as many mysql instances as I want,
I always use specific user, homedir, datadir, my.cnf, for each installation.
In this way I can have theoretically unlimited number of mysql instances on
one host.
See Thread at: http://www.techienuggets.com/Detail?tx=78654 Posted on behalf of
a User
This has proved to be quite challenging. I wasn't able to do the upgrade and
basically created another instance of 5.1 and took a backup of my database from
5.0 and restored it to 5.1. Then added all my users
