Please help with session

Hi,

I have created a login script that creates a user id session from the user email, like so:

// *** Validate request to login to this site.

if (!isset($_SESSION)) {

session_start();

}

$loginFormAction = $_SERVER['PHP_SELF'];

if (isset($_GET['accesscheck'])) {

$_SESSION['PrevUrl'] = $_GET['accesscheck'];

}

if (isset($_POST['distributor_email'])) {

$loginUsername=$_POST['distributor_email'];

$password=$_POST['distributor_password'];

$MM_fldUserAuthorization = "";

$MM_redirectLoginSuccess = "DIST_main.php";

$MM_redirectLoginFailed = "index.php?failed=true";

$MM_redirecttoReferrer = false;

mysql_select_db($database_MySQLconnect, $MySQLconnect);

$LoginRS__query=sprintf("SELECT distributor_email, distributor_password FROM t_distributors WHERE distributor_email=%s AND distributor_password=%s",

GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text"));

$LoginRS = mysql_query($LoginRS__query, $MySQLconnect) or die(mysql_error());

$loginFoundUser = mysql_num_rows($LoginRS);

if ($loginFoundUser) {

$loginStrGroup = "";

//declare two session variables and assign them

$_SESSION['MM_Username'] = $loginUsername;

$_SESSION['MM_UserGroup'] = $loginStrGroup;

if (isset($_SESSION['PrevUrl']) && false) {

$MM_redirectLoginSuccess = $_SESSION['PrevUrl'];

}

header("Location: " . $MM_redirectLoginSuccess );

$datetime = date("Y-m-d H:i:s",time());

$query = "UPDATE mydatabase.t_distributors SET distributor_lastlogin= '$datetime' WHERE distributor_email='$loginUsername'";

$result = mysql_query($query) or die(mysql_error());

}

else {

header("Location: ". $MM_redirectLoginFailed );

}

}

This works fine, but I need to create one more session to store the Company name of the logged in user.

I am struggling to do this as I am new to sessions.

Any help much appreciated.