If you don't have a Vifib account yet, Register to http://www.slapos.org. Then go to "My Space" -> "My Services".
Click on "New service".
Select the "Wordpress" service.
Then click on the Order button.
Choose the latest stable version of the software, which should be in the slapos-0.xxx format (you need to have installed the same Wordpress slapos-0.xxx Software Release if you want to deploy instances of it on your computer.).
You can choose the different parameters of your instance, the computer on which you want the instance in particular(if you don't want it on the public cloud, which would require paying for hosting).
Click on Request when you are done.
You can see your instance being deployed. Reload to have up-to-date informations.
Your instance is ready. All the needed informations can be found in the "Connection" parameters.
Open the url of the frontend with your browser, and you should get the same page.