I new somebody once that downloaded a REALLY good copy of a REALLY good film <<<cough....cough...>> and "he" simply did this to enjoy it on my, I mean HIS player.

Opened dixvtodvd, selected the .avi file.

Choose "Force 16:9" and "Force NTSC" (obviously choose Pal if needed)

Clicked convert.

This left a VIDEO_TS folder.

At this point, I use DVDSkrink to burn it. I use Shrink because it's free, and it allows you to see a preview of what is being converted, so you can check the aspect ratio. Also, unlike just burning the VIDEO_TS folder to a dvd, dvd shrink will alert you if there is a problem in the folder or video files.