I have set up an OSM tile server using instructions at this blog - http://seshagiriprabhu.wordpress.com/2013/07/21/building-an-openstreetmap-tile-server-on-ubuntu-12-04-lts/
The slippymap renders fine and work nice. Now, I want to change the style of the map to OSM Bright. I do not want to (rather, do not have technical expertise to) make any changes to the template. I wish to learn how to render my maps usng OSM Bright or any other Carto CSS templates. I have searched around the net for quite a few days, but cannot find any simple step by step instructions on how to make my mapnik Renderd to display maps with OSM Bright template.
My instance runs on Ubuntu 12.04. Please give me a step by step guide on how to make this happen.