How to use normal site header atop the forum pages?
 

So we want to use our normal banner and nav bar (seen here: http://www.starcraftmethod.com) in the same way in our forums so that the site looks and feels seamless and nobody loses their integration with the rest of the website while they are there.

Completely clueless as to how to go about this - you can see what our forums currently look like over at

http://www.starcraftmethod.com/forums

We'd really like it if the top of the forums just began from where you see the "Starcraft Method Forums" header / log-in rectangle. Also, we would be using a fixed width to match everything up with the size of the main site.

Any tips on where to look or who to talk to?

You need to edit the header template so that it matches ur site header..
goto styles and templates.. select ur style > edit templates and edit header template