I've worked with DVDStyler (Ubuntu). It was very simple. I was looking for a new DVD authoring tool for Windows, but I had other things to do. I guess it was not important because the first step for me was to create MPEG2 clips. The authoring tool would have been the next step.
Maybe shaunthesheep can help? According to
this he created a DVD with LW and DVD Flick. Maybe he could answer?