howto fire our own content type ?

I'm not sure about your question, but the part I do understand, add content-type:

Install flexinode module : http://drupal.org/project/flexinode
Go to administer -> content
Click on "add content type" tab

Probably not what you're asking, but just in case.

-ron

Hey dp,
Though I have no personal experience with the CCK (Content Creation Kit) module, I've heard a lot of good comments about, it might be worth your time. CCK is newer and more robust than Flexinode i hear.

You might also wanna check these links out:

Lullabot podcast on CCK among other things
http://lullabot.com/podcast/drupal_podcast_no_13

The CCK project page
http://drupal.org/project/cck

-Janne C.

I am assuiming you are using 4.7. I'd create a new module

use hook_form_alter to add form fields to the comment page, something like this

function mymodule_form_alter($form_id, &$form) {
  switch ($form_id) {
  // add field to comment form
  case 'comment_form':
    $form['Extra'] = array(
    '#type' => 'fieldset',
    '#title' => t('Extra Data'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
    '#weight' => -8
    );
		  
  $form['Extra']['myfield1'] = array(
    '#type' => 'textfield',
    '#title' => t('My field 1'),
    '#required' => FALSE,
    '#default_value' => $node->myfield1,
    '#weight' => 1
    );
    
  $form['Extra']['myfield2'] = array(
    '#type' => 'textfield',
    '#title' => t('My field 2'),
    '#required' => FALSE,
    '#default_value' => $node->myfield2,
    '#weight' => 1
    );
    break;
  }
}

you'd need to create a new table have nid as the key, install file for it, and add a hook for hook_nodeapi to handle the operations, i.e. update load delete insert, something like

function mymodule_nodeapi(&$node, $op, $teaser, $page) {
  switch ($op) {
    case 'delete revision':
      db_query('DELETE FROM {mytable} WHERE nid = %d', $node->nid);
      break;
    case 'delete':
      db_query('DELETE FROM {mytable} WHERE nid = %d', $node->nid);
      break;
    case 'insert': 
      db_query("INSERT INTO {mytable} (nid, myfield1, myfield2) VALUES (%d, '%s', '%s')", $node->nid, $node->myfield1, $node->myfield2);
      break;
    case 'update':
      db_query('DELETE FROM {mytable} WHERE nid = %d', $node->nid);
      db_query("INSERT INTO {mytable} (nid, myfield1, myfield2) VALUES (%d, '%s', '%s')", $node->nid, $node->myfield1, $node->myfield2
      break;    
    case 'load':
      $object = db_fetch_object(db_query('SELECT myfield1, myfield1 FROM {mytable} WHERE nid = %d', $node->nid));
      return array (
        'myfield1'		=> $object->myfield1,
        'myfield1'		=> $object->myfield1);
        break;
    case 'validate':
    case 'submit':
      break;
	  }
}

hope this helps

Hey dp,
I read your question too quickly and missed the whole point that you were looking to work with comments, not nodes.

-Janne