I just got the new MacBook (love it!), and the new finger gestures are pretty cool. Expose works really well, but I'm not too fond about the four finger left/right gestures. I have spaces set up, and I'd rather use the four finger gestures for left and right swipes to switch between spaces. I can't find a way to do this in the system prefs - is there some type of work-around to getting this to work?