should be as simple as mod'n your configuration.php file .. to busy myself to actually make a Joomla app for it ;) .. use a wrapper and point content to API enabled pool .. that would work for starters .. but I think all you need to do is follow the link above and tweak your config for your site. Or even use their Quick & Easy method to enable it on your site. http://developer.cooliris.com/?p=quick
Hope it helps, and it never hurts to check out your CMS developments; in your case, http://extentions.joomla.org .. tltc ;)