Change Page Template Based on Category

I’m pretty sure you could also do what you want by filtering template_include. This is super-untested, but maybe this can get you headed in the right direction:

function wpse53871( $template ) {
    global $post;
    // check if is a Post and in the 'scott' category
    if( is_single( $post->ID ) && has_category( 'scott', $post ) ) {
        return get_template_part( 'page' );
    } else {
        return $template;
    }
}
add_filter( 'locate_template', 'wpse52871' );

Here’s another example of the filter in use.

Additional

You can also add a filter to single_template

add_filter( 'single_template', 'wpse53871' );