install.php

<?php
	echo 'This has been customized!!!';
	
	// Perform post-install customizations
	if ( function_exists( 'add_action' ) ){
		add_action( 'wp_mail_content_type' , customize_install );
		function customize_install(){
			
			// Switch themes
			switch_theme('twentytwelve');
			
			// Default the timezone
			update_option( 'timezone_string', 'America/Chicago' );
			
			// Increase the Size of the Post Editor
 			update_option( 'default_post_edit_rows',40 );
 			
			// Remove Hello Dolly 
			delete_plugins( array('hello.php') );

    			// Remove default hello world post
	        	wp_delete_post(1,true);

			// Remove default sample page
			wp_delete_post(2,true);

			// Remove default Mr.Wordpress comment
      			wp_delete_comment( 1, true ) ;
      		
      			// Activate Akismet
      			activate_plugin( WP_PLUGIN_DIR . '/akismet/akismet.php' );
      		
			// Update Permalinks
			update_option( 'selection','custom' );
			update_option( 'permalink_structure','/%post_id%/%postname%/' );
			global $wp_rewrite;
			$wp_rewrite->flush_rules();
			
			// Prevent new website notice
			global $phpmailer;
			$phpmailer = new PHPMailer(); // reset
		}
	}