Unable to theme a webform

Hi,
First of all am a newbie. So if my questions sound stupid they may be stupid. I have done lot of RTFM and googling but failed. I have 3 problems, all related to themes. First one is I need to theme a webform. I have read the webform readme files and they said:

Theming a webform can be useful for rearranging elements or customizing the
appearance of multiple components at once. This tutorial assumes usage
of the phptemplate engine.

- Open your template.php file located in your theme's directory.
- Add the following lines of php code:

function phptemplate_webform_form_[node id here] ($form) {
return _phptemplate_callback('webform_form_[node id here]', array('form' => $form));
}

- Replace "[node id here]" with the node ID of the form.

- Create a new file in your theme's directory named
"webform-form-[node id here].tpl.php", once again replacing [node id here]
with the node ID of the webform.

- Open up your new file and customize the webform however you like. Here's an
example putting a field with the "email" key inside of another fieldset.

  // Create a new fieldset within the main fieldset
  // Note: All fields MUST stay within the 'submitted' fieldset
  $form['submitted']['newfieldset'] = array(
    '#type' => 'fieldset',
  );
  
  // Move the form field labeled "email" to the new fieldset
  $form['submitted']['newfieldset']['email'] = $form['submitted']['email'];
  unset($form['submitted']['email']);
  print drupal_render($form);

So accordingly I created a file named "webform_form_10.tpl.php" and placed following code in the file

$form['submitted']['name']['Name'] = $form['submitted']['whats your name'];
unset($form['submitted']['Name']);
$form['submitted']['email']['Email'] = $form['submitted']['and email'];
unset($form['submitted']['Email']);


echo drupal_render($form);

Added following function to the template.php file

function phptemplate_webform_form_10 ($form) {
  return _phptemplate_callback('webform_form_10', array('form' => $form));
}

Nothing ever happened and I dont know why, for the sake of clarity, I am using garland theme.

Any help?