If you want to display a custom page for your blog this one method

Lets assume it's an "About" page.

1: Open the index.main.php for your skin and find

<?php
		// -------------- MAIN CONTENT TEMPLATE INCLUDED HERE (Based on $disp) --------------
		skin_include( '$disp$', array(
				'disp_posts'  => '',		// We already handled this case above
				'disp_single' => '',		// We already handled this case above
				'disp_page'   => '',		// We already handled this case above
              'disp_about'	 => '_about.disp.php',
				) );
		// Note: you can customize any of the sub templates included here by
		// copying the matching php file into your skin directory.
		// ------------------------- END OF MAIN CONTENT TEMPLATE ---------------------------
	?> 

Simply add

'disp_about'	 => '_about.disp.php',

to the list as shown above.

2: Now build a .php page in your favourite editor...
Example:

<?php
   
   //Check page isn't being accessed directly
   if( !defined('EVO_MAIN_INIT') ) die( 'Please, do not access this page directly.' );
{
    //Show About page
    ?>
<h2 class="bTitle"><?php echo T_('About Me') ?></h2>
<div class="bPost"><div class="bText">
<p>Yadda yadda yadda<br />
Yadda yadda yadda yadda yadda</p><p>etc etc</p>
</div></div>
 <?php
}
?> 

3: Save this page as _about.disp.php

4:Load the index.main.php and the _about.disp.php into your skins/yourskin folder

5 Load http://yoursite.com/index.php?disp=about
and you should have your custom About Page.