Adding regions....please help! (Newb)

Hello.

I haven't built web pages since back when CSS was just catching on, so please be gentle on this newb!

I'm trying to add three new regions (taken directly from the Sandium theme
) to Arthemia, and I have *partially* succeeded. The regions, Top Left, Top Middle and Top Right, show up on the blocks page, and I'm able to add and see content; however, the regions do NOT appear on any other page.

I suspect that this is related to php, but I just can't figure it out.

Here's a section of the altered php code I've got going on for page.tpl.php:

 <?php if ($featured): ?>
          <div id="featured">
            <?php print $featured; ?>
          </div>
        <?php endif; ?>
      </div>
     	   <div class="clear"></div>
        <?php if ($top_left || $top_middle || $top_right): ?>
     	  <div id="content-top-container">
          <div id="top-left"><?php print $top_left ?></div>
          <div id="top-middle"><?php print $top_middle ?></div>
          <div id="top-right"><?php print $top_right ?></div>
          <div class="clear"></div>
        <?php endif; ?>
		</div>
		
		<?php endif; ?>
		   <div class="clear"></div>
            <?php if ($middle):?>
        <div id="middle" class="clearfloat">
          <?php print $middle; ?>
        </div>
      <?php endif; ?>

Here are the two respective, unaltered template.php for Arthemia and Sandium that I believe I have to somehow merge into Arthemia only:

Arthemia --

function arthemia_body_class($sidebar_primary, $sidebar_secondary) {
  if ($sidebar_primary != '' && $sidebar_secondary != '') {
    $class = 'with-sidebars';
  }
  else {
    if ($sidebar_primary != '') {
      $class = 'with-sidebar-primary';
    }
    elseif ($sidebar_secondary != '') {
      $class = 'with-sidebar-secondary';
    }
    else {
      $class = 'no-sidebars';
    }
  }
  return $class;

}

Sandium --

function phptemplate_body_classes($top_left, $top_right, $top_center) {
  if ($top_left != '' && $top_right != '' && $top_center != '') {
    $class = 'sidebars';
  }
  else {
    if ($top_left != '') {
      $class = 'sidebar-left';
    }
    if ($top_right != '') {
      $class = 'sidebar-right';
    }
    if ($top_center != '') {
      $class = 'sidebar-center';
    }
  }

  if (isset($class)) {
    print ' class="'. $class .'"';
  }
}

I would truly appreciate any help with this I can get!

Thanks!