In docs.postnuke.com -> manuals -> install, is recommended to "delete all the files in the directory" when upgrading. In the top post of this topic, I suggested a different procedure:
Not deleting the files, but making the untar overwrite THE NEW files, LEAVING ALL the "non standard" in theyr own places.
If you have a "deep" customized site, perhaps my way is better than deleting all and then re-placing all CUSTOM files to theyr right places.
For a manual upgrade of the SQL, the first thing is to export the old database (structure only) and fetch wich NEW TABLES are defined, comparing with the new SQL in the distribution.
The second, rebuild the SQL dump with the new tables, and then create the database (or override)
