How do I add instructions to Private Message screen?

[Richard E]

I need a bit more help with this since I am a total php-newbie.

I'm in the private.php file. Is this the place I need to change?

// ############################### start new pm ###############################
// form for creating a new private message
if ($_REQUEST['do'] == 'newpm')
{
	if ($permissions['pmquota'] < 1)
	{
		print_no_permission();
	}
	else if (!$vbulletin->userinfo['receivepm'])
	{
		eval(standard_error(fetch_error('pm_turnedoff')));
	}

	if (fetch_privatemessage_throttle_reached($vbulletin->userinfo['userid']))
	{
		eval(standard_error(fetch_error('pm_throttle_reached', $vbulletin->userinfo['permissions']['pmthrottlequantity'], $vbulletin->options['pmthrottleperiod'])));
	}

	require_once(DIR . '/includes/functions_newpost.php');

	($hook = vBulletinHook::fetch_hook('private_newpm_start')) ? eval($hook) : false;

Where do I paste in the boilerplate text?

Thanks,
Richard