Joomla 1.7 Upgrade

I'm not sure if this is a potential bug, so feel free to move it if it's in the wrong forum.

We have a site running Joomla 1.7 and Hikashop 1.5.3 business with a lot of file modifications.

I want to upgrade to Joomla 1.7.3 but noticed this blurb in the Upgrade Instructions for 1.7 to 1.7.1 ( docs.joomla.org/Upgrading_1.6_from_an_existing_1.6x_version ):

With the 1.7.0 to 1.7.1 upgrade, there are some database changes that need to be made.

If you use one of these manual methods to copy the files, you also need to manually update your site's database. To do so locate the six files beginning with 1.7.1 in the folder /administrator/components/com_admin/sql/updates/mysql.

Inside these files you will find parts like #__modules and #__categories. Replace the pound sign and the first underscore (#_) with your database tables prefix. By default this is jos. If you didn't get the prefix before starting, open your site's configuration.php and search for $dbprefix. The string inside the single quotes behind it is what you're looking for. So you need to change #__languages to jos_languages and so on.

Once you've done this go to your site's phpmyadmin (or any way you usually manage your database) and open the database your site uses. There will be a tab called SQL, open this. Paste the content of your modified sql files inside the text area and press go.

Thanks for the prompt response Nicolas.