One node on multiple pages with tabbed navigation between fields
This is fairly easy to implement so I think you're right not to want to include a whole module to do this. There's loads of ways to do this but here's one way I've done it recently:

In an overridden node.tpl.php, individually print out the fields you'd like tabbed in a wrapper. Within the wrapper you'll also need to print the links for each tab, with a href pointing to the ID of the item it's related to. Something like this:

&lt;div class="tabs"&gt;
  &lt;ul&gt;
    &lt;li&gt;&lt;a href="#field1"&gt;&lt;!-- Field Label --&gt;&lt;/a&gt;&lt;/li&gt;
  &lt;/ul&gt;

  &lt;div id="field1"&gt;
    &lt;!-- Field Content --&gt;
  &lt;/div&gt;
&lt;/div&gt;


You can then write some simple jQuery to show and hide the tabs on click:

$('div.product_tabs ul a').click(function () {
  $('div.tabs &gt; div').hide().filter(this.hash).show();

  $('div.tabs ul a').removeClass('selected');
  $(this).addClass('selected');

  return false;
}).filter(':first').click();


You could easily extend this so when the URL is visited with the fragment identifier on the end, the correct tab is shown.