Adding a page break

[j1mmy]

Take a look at this: http://img2.pict.com/99/e4/27/fe9639...q8/capture.png

I am basically trying to add a page break or some form of line separation from the top line of the vBulletin Message header and the navbar, as you can see they're touching.

But looking at the templates, I'm having difficulty in identifying where to put it.