If you mean the splitting into segments take a look at this thread
http://www.videoforums.co.uk/sony-ve...ts-screen.html
It's long but has a variety of ways of doing this. If you're using V6 Movie Studio rather than full Vegas 6 it'll take a lot longer as you'll have to do intermediate renders due to being limited to 4 video tracks.
Pay particular attention to the method described by Grazie.