Elijah - 2:37 am on Mar 3, 2005 (gmt 0)
Upgrading will not change any of your forum data. All your forum data is stored in a database, separate from the phpBB files. Unless you have installed mods to your forum, you can just overwrite the old files with the new versions, except for config.php. You don't want to overite config.php because it contains your forum configuration.