NOTE: These instructions were written for WordPress version 1.2.2.
There are a number of published ways to add custom pages to your WordPress web site such as the EZStatic plugin.  I am simply displaying the solution I came up with.
- Open your index.php file for editing.
- Locate <div id="content">
- Add the following snippet of code below <div id="content">:
<?php
if (isset($_GET['p'])) {
  $bt_custom_page = false;
  $bt_page = $_GET['p'];
  if (
    preg_match(
      '/^(about|documents|projects|contact)$/i', $bt_page) > 0) {
    if ((include 'bt_' . $bt_page . '.inc.php') !== false) {
      $bt_custom_page = true;
    }
  }
}
if (!$bt_custom_page) {
?>
- Locate <div id="menu">and notice the</div>just above it.
- Add the following snippet of code above that </div>:
<?php } ?>
<div class="post">
<h3>About</h3>
<p>Write your content here.</p>
</div>
- Now direct your browser to your WordPress web site and append ?p=aboutto the address e.g. http://www.yourwebsite.com/index.php?p=about
- Add links to these custom pages by using the WordPress link manager
- You can add more custom pages by modifying the list of pages about|documents|projects|contactin the first snippet of code that you added to your index.php file
Please let me know if any of the instructions above are unclear by commenting on this post. I will attempt to clarify any ambiguity.