Use this to load the WP Bootstrap anywhere. Of course, if you aren't loading this into multiple scripts, just use the code inside the function and paste it directly into your PHP script.

gistfile1.txt

function load_wp_bootstrap() {
	// Traverse the directory back to the root of the WordPress install.
	// Adding a dirname() will go back one directory (equivilent to ../).
	$root = dirname( dirname( dirname( dirname( dirname( __FILE__ ) ) ) ) );

	// Load the WordPress Bootstrap
	if ( file_exists( $root . '/wp-load.php' ) ) require_once( $root . '/wp-load.php' );
}