DVD Flicki Help

I purchased a DVD burner (LG GSA-2166D) some time ago. I have burned several movies. The problem I am having is with DVD Flick. It burns just fine, but, I would like to know if anybody knows how to set it so I do not have such huge black spaces at the top and bottom. Some people, such as older ones, do not really like this. Is there a setting in DVD flick that I can control the width of the black?