Any page that you have staff powers over now gives you access to adding dynamic content to the page. Click the 'Add Content' link at the top right of the page (it's lighter and bigger than the rest of the sub header links) and then choose the type of content you want to add to the page.

You can either create a blank content box from scratch by choosing the first 'Add Custom Content' option. This lets you add a content box which lets you completely choose the title and text. All forum tags and basic HTML tags can be used for this. You can see an example of a blank content box that I'm demonstrating as an Announcement here:
https://www.vizzed.com/boards/forum.php?id=140

You can also choose one of the content templates which are pre-programmed content boxes that you'd see on various sections of the site. Usually adding one of these lets you further customize the selected content in a few ways (I still have to add customization options for some of them).

Any content added to a page can be edited, moved and removed. Click the Edit link next to a dynamic content box to change the optional details of it. Click the up or down arrows to move the content up or down the page (you can only move it above and below other dynamic content boxes). Click the X button to completely remove the content from the page.

On most pages, the dynamic content appears toward the bottom of the page but there are some pages where it'll appear toward the top or the middle. Anyone with Staff powers can add, edit and move content but only Admins can remove content.

There are only a few pages of the site where users have Staff and Admin powers. I'll eventually add more pages to the site that offer users access to these abilities but for now, here's a list of pages that users currently have Staff and Admin powers over:
-Forums (dynamic content appears right above list of threads)
-Video Game Music Room Playlists
-Game Pages (if it's a rom hack you made or if you're a site staff member)
-New Profile Pages (coming soon)
-Lots of other "secret" future features

Keep in mind that whole page editing and content adding is all still in development and I'll continue fixing and enhancing these features.

Nice, can ones that are added be deleted also?

That's pretty Cool, I'm sure some people would like this. I'm not in charge of any pages as far as I know but I know that members with more  power than me would like this.

zanderlex : What do you mean ones that are added? The default content of a page can't be removed. The only thing that can be removed are what is considered dynamic content and that's content that isn't hard coded on a page and has the red X at the top right corner of the content box.