Diapo Basic - a slideshow module that is exactly you need to promote special offers/ banners.

This slider is included in Quietly Simple Theme : http://www.opencart.com/index.php?route=marketplace/extension/info&extension_id=11830

Demo here: http://demo7.oc-extensions.com/themes/qsimple/

Install guide here: http://www.oc-extensions.com/Diapo-Basic