Changing which content appears at which parts of site
There is many ways to do this:
- you might use the arg() values and act based on that

        if (arg(0) == 'node' &amp;&amp; arg(1) == 'add' &amp;&amp; arg(2) == 'YOUR-CONTENT-TYPE') {
               // do something
         }



or you can use template_preprocess_node function in your theme, and act based on the node values.