I am importing video from my mom's camera for her so I can burn it to a DVD, but I am trying to do other things with my PowerBook while I import the video. However, I cannot seem to shut iMovie up so I can do other stuff. Everytime I move iMovie's volume slider, it moves the whole system's volume and vice versa. All I want to do is listen to some music or hear a website, etc. without the movie playing in the background. Is there any way to do this?