Hi, I read this thread on Nov. 3, 2008 because I wanted to burn 2 DivX avi files onto one DVD. They were each half of a movie meant for a CD.
I started doing it like shafling mentioned, but then thought of an easier way. I then searched for and DLed an avi joiner program, joined them, and then converted them using Convert X. Then I burned it using Convert X. It worked fine.
I then thought the next day that the method shafling mentioned would be good for burning 2 or 3 avi files to DVD that are not part of the same movie.