Want to Change theme to display pages instead of posts

I’m setting up a new WordPress blog, and I want to use it more as a CMS than a blog site. The problem I’m having is that most of the themes I’ve checked out have a default to display posts on the first view of the site. I prefer to use pages, and would like to modify the theme to default to the page which is page 0 in the menu order. How can I do this? The code in the index.php file is
‘<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>’
I tried changing all the ‘posts’ to ‘pages’ but that caused an error. Any suggestions?
I’m working with Vistered Little 1.6 if that’s any help.