I have the same program as you i know what to do. click and hold on your movie file and move it onto your desktop. than open up nero and in the top right hand corner click on dvd. Then click on Photo and Video and click make video dvd (not video cd, not svcd, and not mini cd). and click on add video file, and go under desktop and get your video file. Btw this takes 2-3 hours to burn.
I hope this has helped