Does not work

While I cannot say that this project is not working under my under my setup, I don't think it's working right.

On my D5.1 install running menutrails.module I have a horizontal Primary links menu ('Site menu'), as tabs with hierarchy. 'Site menu' is also set as my Secondary links menu. When I click onto a primary link the next page load will present the additional secondary links below the primary links (pretty standard, I believe it's exactly whats pictured in the sample screenshot).

Here is my 'Site menu' structure:

Fruit (taxonomy)
--apples (taxonomy)
--oranges (taxonomy)
--watermelon (taxonomy)
Vegatables (taxonomy)
--tomato (taxonomy)
Community
--Forums (forums)
--Links (cck)
--Join (page)

Let's take a look at the 'Fruit' link and it's children. When a user would click on Fruit > watermelon and then a node under that taxonomy, I needed Fruit > watermelon to stay active as they get deeper into the watermelon taxonomy. Perhaps the Watermelon taxonomy also has several child categories, watermelon would still have to stay active.

This is where menutrails.module comes into play. It was able to take care of all of that for me without a problem. Oddly enough, I didn't input the installed snippet into my template.php and yet it seemed to be working fine.

Then I was testing Community > Forums. I had set the variables for the Menu trails by category: Forums in the menutrails settings admin to keep the Community > Forums link active under each category in the forum. However, no luck. I figured maybe a situation like this is where I needed to input that snippet. So I did just as it is in the documentation:

<?php function _phptemplate_variables($hook, $vars = array()) {
  switch ($hook) { // what function is active?
    case 'page': // page is where menu comes into play
      // set the primary links
      $vars['primary_links'] = menutrails_primary_links(1);
      // you may want to also override secondary_links
      $vars['secondary_links'] = menutrails_primary_links(2);
      break;
  }
}?>

That didn't change anything, the module did not lose or gain any functionality. It later threw an error when I had to install another _phptemplate_variable snippet so I merged it with that so it now looks like:

<?php
function _phptemplate_variables($hook, $variables = array()) {
  switch ($hook) {
    case 'page':
        if (module_exists('path')) {
        $alias = drupal_get_path_alias($_GET['q']);
        if ($alias != $_GET['q']) {
          $custom_layouts = array();
          $layout_filename = 'page';
          foreach (explode('/', $alias) as $path_name) {
            $layout_filename = $layout_filename . '-' . $path_name;
            $custom_layouts[] = $layout_filename;
          }
        }
        $variables['template_files'] = $custom_layouts;
      }
      $vars['primary_links'] = menutrails_primary_links(1);
      $vars['secondary_links'] = menutrails_primary_links(2);
      break;
  }
 
  return $variables;
}
?>

I really have no idea if this is right, or if I needed to do anything additional to the snippet when I installed it. For example, I do not know what the number means at the end of menutrails_primary_links(1) as I know just enough PHP to get by. Is it the menuID or is it nothing that needs to be changed or what.

So my questions are:

1. Why was this script working as advertised without adding the snippet?
2. What do I have to do to the snippet when I insert it into a BLANK template.php?
3. Why does it not work with the forums? (I assume something to do with the snippet)

Please let me know at your earliest convenience.

Thanks in advance!