Taxonomy Term Archive - Rewrite and include template file

<?php

function taxonomy_term_archve_rewrite_rules() {
    add_rewrite_rule( '(.+)/?$', 'index.php?taxonomy=$matches[1]', 'top' );
}
add_action( 'init', 'taxonomy_term_archve_rewrite_rules' );

function taxonomy_term_archive_template( $template ) {

    global $wp_query;

    // Check if the query_var taxonomy is set
    if ( isset( $wp_query->query_vars['taxonomy'] ) ) {

        // Custom template file in my theme
        $taxonomy_term_archive_template = TEMPLATEPATH . '/templates/taxonomy-term-archive.php';

        // Return the template file
        if ( file_exists( $taxonomy_term_archive_template ) ) {
            $file_headers = @get_headers( $taxonomy_term_archive_template );
            if ( $file_headers[0] != 'HTTP/1.0 404 Not Found' ) {
                return $taxonomy_term_archive_template;
            }
        }
    }
    return $template;
}
add_filter( 'template_include', 'taxonomy_term_archive_template' );