In order to burn avi files to dvd you have to convert them to mpg2 this download will help. http://divx.trustfm.com.ru/ it converts them to mpg2 ready for dvd-r burning however requires 15 gb memory just to operate (iv downloaded it however don't have enough free space to run it. Hope this helps.
nero vision is the best, u get so much control. U can create menus, chapters, select quality, so MUCH. definitely nero vision is the way to go
Yeh Nero is good, but it takes ages to compile all the menus and script's. and also, it's hard to find Nero Vision 4