Include the Taxonomy name on Archive pages

Hi,

I am looking for a solution to include a txonomy term on the archive pages such as http://handheld.simplecsr.com/calories/1000-1500/

Currently these use the default index.php page and have the static code:

<div class=”main_category_title”>

<h1>Category: <?php single_cat_title(); ?></h1>

</div>

1. I would like to find a way to replace the static word “Category: ” with the taxonomy name. In this example “Calories: “

2. I am using the same index.php page for blog post and my new content type of Walks.

How do I get my new Content Type of “Walks” to use its own index file? What do i need to name it?

(I am using a child theme for all these changes)

Many thanks

Chris