This site is using software from http://www.drupal.org. I started with Drupal 4.7.3 and the site ran fine for years. I then decided to upgrade to the latest Drupal versions. The following are the steps I took. Also note that I moved this site from one host to another.
- Mysqldump the data from the old DB
- Mysql import the data to the new DB
- Install version 4.7.10 (No contrib module code).
- Execute update.php
- Install version 5.0
- Execute update.php
- Install version 5.16
- Execute update.php
- Install version 6.10
- Execute update.php
- Install the contrib modules
- Execute update.php
At this point I have a working Drupal 6.10 version of the site.