Adding PHP pages, not showing dynamic content?

Question

Hi all,
I'm new and hoping I don't get ripped apart for a question that seems simple. I've looked a lot though and can't seem to find an exact scenario like this. I recently took over a PHP site for a friend that was built in Dreamweaver CS3.
There's a master page (main.php) that includes a header and footer and middle area of dynamic content. Thus, all of the pages appear like: http://www.SITENAME.com/main.php?mod=about (for the 'about' page) or www.SITENAME.com/main.php?mod=welcome (for the landing/home page), etc.
In main.php, there's a section of: // Include Multiple Static Pages that looks like this:
$mxiObj->IncludeStatic("about", "about.php");
for every static page.
All of this makes sense to me. Here's my problem:
When adding a new page now, I can't get it to show any of the dynamic content on the live site. I just get the static header and footer to show.
In the main.php file, there's this section:
</div>
  <div id="mainContent">
    <p> 
      <?php
  $incFileName = $mxiObj->getCurrentInclude();
  if ($incFileName !== null)  {
    mxi_includes_start($incFileName);
    require(basename($incFileName)); // require the page content
    mxi_includes_end();
?></p>
</div>
that's supposed to pull in the dynamic content. It's doing this just fine on the older pages, but not on the ones I'm trying to build now.
I guess I'm asking if there's some type of file in an 'includes' folder that I'm missing where I need to make sure the FileName is also listed (not just in the static section on main.php)? What's the mising link that will get this dynamic content to show up?
Thanks for any help in advance and for reading this!

Answer 1

The quickest way to add new pages is to
copy the template (index.php) to a new document (newdoc.php or similar)
remove the PHP stuff - stuff that is not required for the new content
if there are inludes for the menu, header, footer or similar, then you can link those back into the document using standard includes
add the new content to the newly created document
This will give you a stand-alone document. At a later stage you can convert these documents into a DW-template system.