Adding a Pic to Header Total Newbie

Oh yes, sorry. It’s here on a temporary domaine:

http://wp.stiborg.dk/

Nothing has really been done to it yet, other than adding the Mimbu Theme.

There are several ways of doing it. You could edit header.php, remove the code that is creating the current header, and replace it with your logo image. However, that would not be my first choice, because the header text is the name and description of your blog, and you want that text to remain accessible to search engines, and people with vision disabilities.

I would recommend you try this instead. First, upload your logo to the images folder of your theme. Then find the #masthead section of your style.css file, and edit it as follows:

http://wp.stiborg.dk/wp-content/themes/mimbo/style.css (around line 138):

#masthead {
border-bottom: 1px solid #607B88;
padding: 22px 0;
text-indent: -9999px; /* move the header text off-screen */
background: url(‘images/logo.gif’) no-repeat; /* add the logo */
}