Hi, i'm currently tweaking the PrimePress theme for a charitable organisation. They were looking for specific header images on each page so i've implemented a series of IF statements as outlined in this post - http://www.techtrot.com/support/topic/fixed-header-per-page - to choose what image to display.
If you only want one image, you don't need the IF statements. So in your header-images.php file, copy the the line written there and paste it below it. You can then comment out the original liine by typing <!-- before it and --> after it. (I suggest this, just so that you can easily undo your changes). Then change the duplicate line that you pasted below to point to a single image rather than the rotating script. Your full code should look like the following:
<!--
<img src="<?php bloginfo('template_url'); ?>/rotating.php?image=<?php echo mt_rand(0,100); ?>" width="920" alt="<?php bloginfo('name'); ?> Rotating Header Image" title="<?php bloginfo('name'); ?> Random Header Image" />
-->
<img src="<?php bloginfo('template_url'); ?>/headers/yourheaderimage.jpg" width="920" alt="<?php bloginfo('name'); ?> header image" />
Of course, since PrimePress loops through any number of images in your headers folder, you could just have one image in there, as suggested in this post: http://www.techtrot.com/support/topic/not-have-rotating-images But it seems more sensible to me not to be calling the rotating script at all if you are not going to use it.