If for some reason you need to change your PhotoPost tables to use a prefix because of conflicts with other scripts; this group of RENAMEs will accomplish what you need quickly.
First, close your gallery. Then paste these commands into phpmyadmin using your PhotoPost database.
Code:
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You'll need to edit your config-inc.php and change
$pp_db_prefix = "pp_";
That's it. Now your tables are using a pp_ prefix which will avoid any conflicts with other tables created in your database by other applications.