Change "Lightword" default feed chicklet to Feedburner

Hi All,

Having issues similar to this resolved post:
http://wordpress.org/support/topic/change-the-default-feed?replies=5
I’m trying to change that orange RSS chicklet (and all RSS links) that comes standard on the “Lightword” template so that it links to my Feedburner feed instead of the standard ‘index.php/feed’

I already have a Feedburner feed:
http://feeds.feedburner.com/DesignerRants
that is live and burning my blog’s default feed:
http://krisbunda.com/blog/index.php/feed/

I’ve tried using several plugins, including the FD Feedburner plugin mentioned in the above linked topic. I’m wondering if these plugins don’t work because my blog isn’t on the root of my domain, but is located at:
http://krisbunda.com/blog/

I’m not familiar with php, just xhtml and css, and I’ve been researching for a couple hours on this. Even when I look in the editor under the “header” or “custom_header” php files, I can’t find any links to the rss feed, although it’s plainly seen if you view source of one of my blog pages…

If anyone can help me with this, I’d appreciate it.

Thanks
Kris