Check out the demo available to get an understanding of what you can do with Vertex and this style. The Vertex admin area is visible even when not logged in, just click the admin menu item in the top right of the menu and you will be able to demo it without saving changes.
The Phosphorus phpBB style is a very versatile and gives a wide variety of options. This month also introduces a new interface for the Vertex Framework and the ability to install modules! Vertex Framework for phpBB is truly turning the forum system into a CMS. The framework is becoming quite polished, this month we've also revamped the admin to give it a nice slick look.