InfoBar will place an Information Bar across the top of your page. It will detect whether a user is logged in or not and prompt them to login or register.
You can configure the infobar.css to suit your site.
This edit will require you to edit 3 files and upload 4 files.
NO FILES ARE OVERWRITTEN
Should work on all versions.
http://www.opencart.com/index.php?route ... ion_id=864