Great program, Best quality I have seen for AVI to DVD, especially with CCE / HC / Quenc. Can take a while to encode, but the result is unsurpassed, ConvertXtoDVD is an other product to look at (Even though it will do the encoding in an hour or so) I don't find it to be as good, Its built in encoder is no where near the quality as the ones mentioned above, not to mention 40.00 US Bucks!
Give it a crack its Free, and remember to have all your codec's sorted!