How to upgrade the site that uses Usernode to 6x?

Hi,
Thanks for your reply, but it is not really answering my question.
I have read the link that you provided before, but it still does not address the question of an upgrade in terms of data migration.
The problem is that my Usernode contnet type has an additional CCK field attached to it called "About me", which is where people have entered a lot of data over the years. On my simulation 5x site, when I uninstall the Usernode module, the usernode content type and all usernode nodes are deleted. So I need a way to completely uninstall the Usernode, while also preserving the data (the title of the usernode and the data in the CCK field "about me").

None of this is outlined in any of the documentation.

Any suggestions?

Below is the original code from usernode.install file. I'm not a coder so I need help. Maybe I could comment out some of the lines here, so that the unistall goes ahead as usual, but the usernode content type and all the usernode contnet stays intact?

Can someone have a look and let me know if that could work?

<?php
// $Id: usernode.install,v 1.3.2.5 2007/10/12 14:27:09 fago Exp $

if (!defined('USERNODE_CONTENT_TYPE')) {
  //if the module isn't included yet, we need to make this define so that things are working...
  define('USERNODE_CONTENT_TYPE', "usernode");
}

function usernode_install() {
  switch ($GLOBALS['db_type']) {
    case 'mysqli':
    case 'mysql':
      db_query("CREATE TABLE if not exists {usernode} (
        nid int(10) unsigned NOT NULL,
        uid int(10) unsigned NOT NULL,
        PRIMARY KEY(uid,nid)
      ) TYPE=MyISAM /*!40100 DEFAULT CHARACTER SET utf8 */;");
      break;
    case 'pgsql':
      db_query("CREATE TABLE {usernode} (
        nid int_unsigned NOT NULL,
        uid int_unsigned NOT NULL,
        PRIMARY KEY(uid,nid)
      )");
      break;
    default:
      break;
  }

  // Prevent the promotion of new usernode objects to the front page by default,
  // by only placing 'status' (the 'Published' option) into the node options.
  variable_set('node_options_'. USERNODE_CONTENT_TYPE, array('status'));
}

function usernode_uninstall() {
  include_once(drupal_get_path('module', 'usernode') .'/usernode.module');
  // We can't call node_type_delete() because usernode_delete() forbids that,
  // so let's find and delete the usernodes manually
  $result = db_query("SELECT u.* FROM {users} u ".
                     "JOIN {node} n ON u.uid = n.uid ".
                     "WHERE n.type = '". USERNODE_CONTENT_TYPE ."'");

  while ($user = db_fetch_object($result)) {
    usernode_delete_node($user);
  }

  db_query("DROP TABLE {usernode}");
  db_query("DELETE FROM {node_type} WHERE type = '". USERNODE_CONTENT_TYPE ."'");
  variable_del('node_options_'. USERNODE_CONTENT_TYPE);
}

/*
 * Set the nodefamily maximum population, so that nodefamily knows that usernodes are lonely nodes
 */
function usernode_update_1() {
  if (module_exists('nodefamily')) {
    nodefamily_content_type_set_max(USERNODE_CONTENT_TYPE, 1);
  }
  return array();
}

function usernode_update_2() {
  //when the define was missing during installation, a wrong variable has been created
  //this update removes it
  variable_del('node_options_USERNODE_CONTENT_TYPE');
  return array();
}

Which lines do I need to comment out? And will it work?
Thanks a bunch in advance!