Hm, I'm sure this thread will get moved later on.
Sounds like you are creating a DVD ROM for PC instead of a DVD Video for DVD player.
Here's a website that might be useful
http://www.videohelp.com/
This link uses Nero to create a DVD video after you've authored it using some other software
http://www.dvd-guides.com/guides.php...burn&name=nero
This link uses Tmpgenc to create your DVD video from MPG videos
http://www.videohelp.com/forum/userguides/172123.php
Other ways to Author your DVD
http://www.videohelp.com/guides.php?howtoselect=3;#3;6
Once you've created your DVD structure, you can then use Nero to burn it. I don't think Nero alone can author DVDs.