//Rewrite rule for flickr gallery
function add_mypage_var($public_query_vars) {
    $public_query_vars[] = 'ti';
    $public_query_vars[] = 'fa';
    $public_query_vars[] = 'se';
    $public_query_vars[] = 'id';
    $public_query_vars[] = 'ps';
    $public_query_vars[] = 'ow';
    $public_query_vars[] = 'ho';
    $public_query_vars[] = 'so';

    return $public_query_vars;
}
add_filter('query_vars', 'add_mypage_var');

//add a rewrite rule

function UserLetter() {
add_action( 'generate_rewrite_rules', array(&$this, 'createRewriteRules') );
    }

function createRewriteRules( $wp_rewrite ) {
$new_rules = array(
'galleries/([^/]+)/([^/]+)/([^/]+)/([^/]+)/([^/]+)/([^/]+)/([^/]+)/([^/]+)?$' => 'index.php?pagename=galleries&ti='. $wp_rewrite->preg_index(1).'&fa='. $wp_rewrite->preg_index(2).'&se='. $wp_rewrite->preg_index(3).'&id='. $wp_rewrite->preg_index(4).'&ps='. $wp_rewrite->preg_index(5).'&ow='. $wp_rewrite->preg_index(6).'&ho='. $wp_rewrite->preg_index(7).'&so='. $wp_rewrite->preg_index(8)
        );

        $wp_rewrite->rules = $new_rules + $wp_rewrite->rules;
    }