This isn't going to be very easy.

I'm sure it's possible. Anything's possible in Drupal - especially if you're willing to write some php! But I'm not too comfortable with that.

The problem is that the "this quiz is restricted to 1 entry only" message is a part of the quiz module, and you cannot overide through its admin interface.

However, it might be possible to change this behaviour using the 'rules' module.

Take a look at this video to familiarise yourself with it:

http://gotdrupal.com/videos/drupal-workflow-automation

I just came accross 'rules' a couple of days ago. It allows you to remap all sorts of behaviours.

The idea would be to set up a rule that checks whether or not you are allowed to take a quiz and if not redirect the user to a page saying "you have already submited this form" which displays the link you want, or better still shows the result of the quiz.

Good luck, if you're not there already.

Mark

Add the following to the webform.module file, line 1213:

  // If the user has exceeded the limit of submissions, explain the limit.
  elseif ($limit_exceeded) {
    // if submission limit is one and one form has already been submitted
    if ($node->webform['submit_limit'] == 1 && $submission_count == 1) {
      drupal_set_message('You can only submit this form once. Your submission is below.');
      $my_sid = db_result(db_query("SELECT sid FROM {webform_submissions} WHERE uid=%d and nid=%d",$user->uid,$node->nid));
      drupal_goto('node/'. $node->nid. '/submission/'. $my_sid);
    }
    elseif ($node->webform['submit_interval'] == -1 && $node->webform['submit_limit'] > 1) {
      $message = t('You have submitted this form the maximum number of times (@count).', array('@count' => $node->webform['submit_limit']));
    }
    elseif ($node->webform['submit_interval'] == -1 && $node->webform['submit_limit'] == 1) {
      $message = t('You have already submitted this form.');
    }
    else {
      $message = t('You may not submit another entry at this time.');
    }
    $type = 'error';
  }

Remember to chage the if to elseif on the existing line after the additional code.

As before, this only applies to the case where the number of submissions is limited to one.

If you want this change to survive webform updates you'd need to write a separate module. That's the Drupal way of doing this kind of thing. But I'm not quite up to that yet!