screenshots and demo are tricky for this as its essentially a framework which other mods use; without one or more installed, you get an admincp menu item.
For the add-ons however, the next thing on my to-do list is providing screenshots. (I relised a couple of hours ago that none of my vb4 mods have any :s) You can see a demo of the various mods (Ive currently got all of them installed) on my dev board
http://vb4.giveupalready.com