I'm working my way through these tips: http://www.coolcreation.co.uk/website-design-blog/10-steps-to-protect-the-admin-area-in-wordpress/ across 5 different WP installs I have.
Part 2 mentions renaming the table prefix from wp_ to something more random.
Is this suggested as a way of securing WordPress?
Also, would this effect my existing WP install in anyway. I'd planned to rename my tables in phpMyAdmin, then alt the wp-config.php file.