Image Slider For A Major Promo

I am trying to find a way to have a major promo image slider. Similar to what's here within Drupal but have the client be able to update by only using the admin tools. http://www.urbangreenmedia.com - This is one I made in drupal although I can't think of a way to allow it to be easily updated by the client. Right now this is just code hardcoded into source mode of the wysiwyg editor. Does anyone have any suggestions on a good way to achieve this effect dynamically?

_{Edited by silverwing - moved to appropriate forum}