Cannot burn using NERO 6

I have a .AVI movie file, size 718,205KB. Using SDVDC(Super DVD Creator)the file has been converted to .VOB size 2,691,104 KB. But the Nero 6 that I am using will not burn as it says the file is bigger that 2GB. What does it mean? Surely that will fit in a 4.7GB DVD nicely. I don’t inderstand.
As an alternative, I used SDVDC to burn to a DVD. The DVD plays on my DVD player alright but for the size, 2,691,104 KB, it is only part of the movie! Again I do not understand.
How do you tell if it is not a full movie download or the .AVI was not fully converted to .VOB.
Please help. This is my first attempt.
Thanks

I have the same problem.. I have an .AVI file that I wanted to burn to DVD... but when I tried it said “Unsupported file format”, how do I fix that?

make that three of us who have the same problem. Nero 6 shows me every time that it is an unsupported file format. I am losing my last nerve with this. help me out before I freak out