Hi,
I have been using CopytoDVD for a long time now to burn my music and data.
The same company, VSO Software, has come out with, for quite some time now, a free piece of software to convert Divx movies to a DVD format. Not suprisingly the software is called DivxToDVD.
Anyway I find it totally easy to use and haven't had any quality problems yet either!
claire