Hi. What I've been doing is I created a few banks of my own (.mid files) by category. If I come across a great "cinematic" style sound I save it to my own Cinematic.mid file until it's filled up, and so on.
Another great functionality is to be able to drag a sound from the upper window in the browser to the lower window. Simply have your own .mid file open in the lower one and drag cool sounds you find to it. Although sometimes that causes the search results to get scrambled, but it works.