Run individual validation scripts? - Validation Library

[eluser]WoolyG[/eluser]
Hi,

Is it possible to run individual validation against a specified rule?

eg:

Code:

$rules['register_firstname']="required|xss_clean";

$register_firstname1 = $_POST['register_firstname'];
$register_firstname = mysql_real_escape_string($register_firstname1);

$test = $this->validation->run('register_firstname'); // This bit is probably setting me wrong
echo $test; // Expecting TRUE or FALSE

Cheers
WoolyG