I finally took the time to put the plugin I wrote in the wordpress plugin repository. This makes it even easier to set it up on your Blog.
Simply go to the administration area of your blog, go to the Plugins section and click Add New. There you search for “Full screen background” and normally the first hit should be my plugin.
The next step is to activate it, and change the image you want to show. You do this by editing one line in the source of the plugin. You can do this by clicking the Edit link next to the plugin in the list of active plugins. The line you have to change is indicated with a html comment. Change the src attribute of the img element. That’s it.
Please provide feedback if it works or doesn’t work for you. Thanks!