How can i put a boarder around my board like this guy did. http://www.kimbia.com/forums/ultimatebb.cgi Can somebody tell me what hack that is.

Thanx

It isn't "hacking" the code- he designed a header/footer within the forum controls and used some background images to borderline his forum with, it is very nice looking too IMO...
Head over to the design/integration forum and do a search, you should find a tutorial to get you started on your way to learning how to do your own setup...