Header image for the minimalist theme

Hello everybody,

I’m using the Minimalist theme from techdesigns.co.uk

I like almost everything about it. But it is a headerless theme and I want to add a header image. This shouldn’t be too difficult. But I’m trying to insert the code from http://codex.wordpress.org/Designing_Headers for a while and I didn’t succeed.

Can someone help me?

Style sheet code

/*
Theme Name: Minimalist
Description: Fast loading minimalist theme, utilising mootools, with 5 different colour schemes and no images.
Version: 1
Author: Joey Robinson
Author URI: http://www.techdesigns.co.uk
Latest updated: 7th October 2009
Tags: two-columns, white, black, blue, green, silver, fixed-width, left-sidebar
*/
html, body{ padding:20px 0px 20px 0px; margin:0; text-align:center; font-family:verdana; font-size: 13px;} 

#page{ width:900px; text-align:left; margin-left:auto; margin-right:auto;} 

#header{ position:relative; width:900px; margin: 0px; padding: 0px; height:50px; overflow-x:hidden;}
#header h1{ position:relative; float:left; margin:0px 0px 0px 250px; width: 650px; padding:0px; font-family:arial; font-weight:bold; font-size:20px; text-transform:uppercase;}
#header h1 a{ text-decoration:none;}
#header h1 a:hover{ text-decoration:none;}
#header h2{ position:relative; float:left; clear:left; margin:0px 0px 0px 250px; width: 650px; padding:0px; font-family:arial; font-weight:bold; font-size:14px; text-transform:uppercase;}
#header {
  background: url("<?php bloginfo('stylesheet_directory'); ?>/wc_header.png")
  no-repeat bottom center; }
#headerimg  {
  margin: 7px 9px 0;
  height: 192px;
  width: 740px; }

#leftcol{ width:230px; float:left; position:relative; padding: 0px 20px 0px 0px; text-align:right; overflow-x:hidden;}

#menu {margin:0px 0px; text-align:right; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px; }
#menu a {font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px; text-decoration:none;}
#menu a:hover {font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px; text-decoration:none;}

h2.menuheader {cursor: pointer;font-family:arial; font-weight:bold; font-size:14px; text-transform:uppercase;margin:0px; padding:0px;}

#menu ul {padding: 2px 0px 2px 0px; margin: 0px 0px 0px 0px;list-style: none; width:230px; clear:left; float:right;}
#menu ul li{margin: 0px 0px 0px 0px; display: block; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px;}
#menu ul li a{ width: 225px; display: block; padding: 5px 0px 5px 5px; text-decoration:none; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px; margin: 0px 0px 0px 0px; vertical-align: bottom;}
#menu ul li a:hover{ text-decoration:none; }
#menu ul li ul {padding: 2px 0px 2px 0px; margin: 0px 0px 0px 0px;list-style: none; clear:left; }
#menu ul li ul li{margin: 0px 0px 0px 0px; display: block; }
#menu ul li ul li a{ width: 205px; display: block; padding: 5px 20px 5px 5px; text-decoration:none; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px; margin: 0px 0px 0px 0px; vertical-align: bottom;}
#menu ul li ul li a:hover{ text-decoration:none; }
#menu ul li ul li ul {padding: 2px 0px 2px 0px; margin: 0px 0px 0px 0px;list-style: none; clear:left; }
#menu ul li ul li ul li{margin: 0px 0px 0px 0px; display: block; }
#menu ul li ul li ul li a{ width: 185px; padding: 5px 40px 5px 5px; display: block; text-decoration:none; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px; margin: 0px 0px 0px 0px; vertical-align: bottom;}
#menu ul li ul li ul li a:hover{ text-decoration:none; }
#menu ul li ul li ul li ul {padding: 2px 0px 2px 0px; margin: 0px 0px 0px 0px;list-style: none; clear:left; }
#menu ul li ul li ul li ul li{margin: 0px 0px 0px 0px; display: block; }
#menu ul li ul li ul li ul li a{ width: 165px; padding: 5px 60px 5px 5px; display: block; text-decoration:none; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px; margin: 0px 0px 0px 0px; vertical-align: bottom;}
#menu ul li ul li ul li ul li a:hover{ text-decoration:none; }

ul#recentcomments {padding: 2px 0px 2px 0px; margin: 0px 0px 0px 0px;list-style: none; width:230px; clear:left; float:right;}
ul#recentcomments li{margin: 0px 0px 0px 0px; display: block; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px;}
ul#recentcomments li a{ width: 225px; display: block; padding: 5px 0px 5px 5px; text-decoration:none; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px; margin: 0px 0px 0px 0px; vertical-align: bottom;}
ul#recentcomments li a:hover{ text-decoration:none; }
#recentcomments a{ text-decoration:none; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px;}
#recentcomments a:hover{ text-decoration:none; font-weight:bold; font-family:arial; text-transform:uppercase; font-size:14px; }

#maincol{ float: right; display:inline; position: relative; width:650px; font-family:verdana; font-size: 13px;overflow-x:hidden; text-align:left;}
#maincol h1 {margin:0px 0px 0px 0px; padding:0px; font-family:arial; font-weight:bold; font-size:22px; text-transform:uppercase; clear:both;}
#maincol h2 { margin:0px 0px 0px 0px; padding:0px; font-family:arial; font-weight:bold; font-size:20px;text-transform:uppercase; clear:both;}
#maincol h2 a{ text-decoration:none;} 

#maincol h3 { margin:0px 0px 0px 0px; padding:0px; font-family:arial; font-weight:bold; font-size:18px; text-transform:uppercase; clear:both;}
#maincol h4 { margin:0px 0px 0px 0px; padding:0px; font-family:arial; font-weight:bold;font-size:16px; text-transform:uppercase; clear:both;}
#maincol h5 { margin:0px 0px 0px 0px; padding:0px; font-family:arial; font-weight:bold; font-size:14px; text-transform:uppercase; clear:both;}
#maincol h6 { margin:0px 0px 0px 0px; padding:0px; font-family:arial; font-weight:bold; font-size:12px; text-transform:uppercase; clear:both;}
#maincol p{ font-size: 13px; line-height:1.7em; clear:left;}
#maincol p a:hover{ text-decoration:none;}
#maincol ul{ font-size: 13px; line-height:1.7em; clear:left;}
#maincol ol{ font-size: 13px; line-height:1.7em; clear:left;}

h2.contentheader{ cursor: pointer; position:relative; float:left; margin:0px 0px 0px 0px; padding:0px; font-family:arial; font-weight:bold; font-size:20px; text-transform:uppercase; clear:left;}
h2.contentheader:hover{ }
h2.contentheader:active{ }

.content{clear:both;}

.permalink{ margin:0px 0px 0px 0px; padding:0px; font-family:arial; font-weight:bold; font-size:12px; text-transform:uppercase; clear:both;}
.permalink a{ text-decoration:none;}
.permalink a:hover{ text-decoration:none;} 

table#calendar_wrap {width:230px; overflow:hidden;clear:both; }

#wp-calendar{font-family: verdana; font-size: 13px; text-decoration:none; clear:both;width:210px; margin: 6px auto 6px auto; padding: 0px 10px 0px 10px;}
#wp-calendar a{font-family: verdana; font-size: 13px; text-decoration:none; }
#wp-calendar a:hover{font-family: verdana; font-size: 13px; text-decoration:none; }

blockquote { margin:20px; padding:8px 8px 8px 15px;}
blockquote p {background-color:inherit; font-size:0.9em; line-height:1.3em;}
label {background-color:inherit; font-size:0.9em; font-weight:bold;}
table#wp-calendar {margin:0 0 20px; width:140px;}
code {font-size:1.2em; display:block; padding:5px 5px 5px 8px; margin:5px 0 15px 0;}

#respond{font-weight:normal;}
#s,#submit { font-size:0.9em; margin:0 0 16px; padding:4px; width:130px;}
#author,#email,#url,#comment { font-family:Verdana,Tahoma,Arial,Sans-Serif; font-size:1em; margin:0; padding:4px;}
#commentsection {margin:25px 0 0;}
#commentsection p {margin:0 0 6px;}

img.centered {display:block; margin-left:auto; margin-right:auto;}
img.alignright {padding:4px; margin:0 0 2px 7px; display:inline;}
img.alignleft {padding:4px; margin:0 7px 2px 0; display:inline;}
.aligncenter { display: block; margin-left: auto; margin-right: auto;}
.alignright {float:right;}
.alignleft {float:left;}

.divider{height: 25px; width:604px; background: url(img/divider.jpg) top center no-repeat; margin: 10px auto 5px auto;}
.left { float:left; margin:10px 15px 10px 0;}
.right { float:right; margin:10px 0 5px 10px;}
.center { margin:5px auto 12px; text-align:center;}
.textright {text-align:right;}
.small {font-size:0.8em;}
.bold {font-weight:bold;}
.hide {display:none;}
.post {margin:0px;}

#postinfotext{font-family:arial; font-size: 14px; line-height:1.7em; font-weight:bold; text-transform:uppercase; padding: 0px 0px 0px 0px; margin: 0px 0px 10px 0px;}
#postinfotext a { text-decoration:none;}
#postinfotext a:hover{ }

.commentheader {font-family:arial; font-size: 16px; line-height:1.7em; font-weight:bold; text-transform:uppercase; }
.comment { margin:0 0 10px; padding:2px 5px 0px 8px;}

.commenticon {font-family:arial; font-size: 14px; line-height:1.7em; font-weight:bold; text-transform:uppercase;}
.commenticon a{ text-decoration:none;}
.commenticon a:hover{ }

.commenttext { font-size: 13px; line-height:1.7em; }
.commenttext p{ font-size: 13px; line-height:1.7em; }

.comment p {line-height:1.7em; margin:0px; padding-bottom:2px;}
.gravatarside {float:right; width:48px; height:48px; margin:0px 5px 5px 5px;}
.wp-caption { text-align: center; padding-top: 4px; margin: 10px; -moz-border-radius: 3px; -khtml-border-radius: 3px; -webkit-border-radius: 3px; border-radius: 3px; clear:both;}
.wp-caption img { margin: 0; padding: 0; border: 0 none;}
.wp-caption-dd { font-size: 11px; line-height: 17px; padding: 0 4px 5px; margin: 0;}

.navigation {font-family:arial; font-size: 14px; line-height:1.7em; font-weight:bold; text-transform:uppercase;}
.navigation a { text-decoration:none;}
.navigation a:hover{ }
.prevlink{margin: 0px 6px 0px 0px;}
.nextlink{margin: 0px 0px 0px 6px;}

.clearfix:after { content: "."; display: block; height: 0; clear: both; visibility: hidden; }

.clearfix{display: inline-block;}

/* Hides from IE-mac \*/
* html .clearfix{height: 1%;}
.clearfix{display: block;}
/* End hide from IE-mac */ 

 /*printer styles*/
 @media print{
/*hide the left column when printing*/
#leftcol{display:none;}
#twocols, #maincol{width:100%; float:none;}
}

Header Code

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>

<title><?php bloginfo('name'); ?> - <?php bloginfo('description'); ?></title>

<meta http-equiv="content-type" content="text/html; charset=<?php bloginfo('charset'); ?>" />
<meta name="description" content="<?php bloginfo('name'); ?> - <?php bloginfo('description'); ?>" />
<meta name="keywords" content="<?php bloginfo('name'); ?> - <?php bloginfo('description'); ?>" />
<?php wp_head(); ?>

<link rel="alternate" type="application/rss+xml" title="RSS 2.0" href="<?php bloginfo('rss2_url'); ?>" />
<link rel="alternate" type="text/xml" title="RSS .92" href="<?php bloginfo('rss_url'); ?>" />
<link rel="alternate" type="application/atom+xml" title="Atom 0.3" href="<?php bloginfo('atom_url'); ?>" />
<link rel="pingback" href="<?php bloginfo('pingback_url'); ?>" />

<link rel="stylesheet" type="text/css" href="<?php bloginfo('stylesheet_url'); ?>" />
<link rel="stylesheet" type="text/css" href="<?php bloginfo('stylesheet_directory'); ?>/styles/white.css" title="white" />
<link rel="alternate stylesheet" type="text/css" href="<?php bloginfo('stylesheet_directory'); ?>/styles/black.css" title="black" />
<link rel="alternate stylesheet" type="text/css" href="<?php bloginfo('stylesheet_directory'); ?>/styles/blue.css" title="blue" />
<link rel="alternate stylesheet" type="text/css" href="<?php bloginfo('stylesheet_directory'); ?>/styles/green.css" title="green" />
<link rel="alternate stylesheet" type="text/css" href="<?php bloginfo('stylesheet_directory'); ?>/styles/grey.css" title="grey" />

<script type="text/javascript" src="<?php bloginfo('stylesheet_directory'); ?>/scripts/mootools.js"></script>
<script type="text/javascript" src="<?php bloginfo('stylesheet_directory'); ?>/scripts/script.js"></script>
<script type="text/javascript" src="<?php bloginfo('stylesheet_directory'); ?>/scripts/styleswitcher.js"></script>

</head>

<body>
<div id="page" >
<div id="header" >
<h1><a href="<?php bloginfo('url'); ?>" title="<?php bloginfo('name'); ?>"><?php bloginfo('name'); ?></a></h1>
<h2><?php bloginfo('description'); ?></h2>
</div>