Some time ago, Gary at RWT released a theme, H3, that gave users a way to have a truly usable 3 column layout in RapidWeaver. The manner in which is was done was a little complex to the uninitiated though. Since the arrival of ExtraContent, however, it only makes sense that Gary would update H3 to utilize ExtraContent to propagate this 3 column and that’s exactly what he did.
You can check out the new H3 here, and take a look at the tutorial movies. Take an especially close look at this movie, which demonstrates how you can use ExtraContent to make a search bar in your sites header.