Converting AVI to DVD

Does anybody know a fast and good way to convert avi-files so they can be used for making a dvd with Nero?

the best program in terms of speed and ease of use i have yet used is nero visionexpress
or take your pick

The program I am curently using, and I am new at this burning process also, is DVD Santa. Works well and not complicated. Hope this helps ya:)

I used the nero program today and it worked great when splicing 2 avi. movies together and then I burned to one dvd. CINDI