This screencast assumes that you have already
installed Nero on your computer.
and that you have already downloaded
the Ubuntu CD image to your PC.
So to begin just open up Nero
and in the New Compilation window that opens up,
you can safely click on Cancel here to close it.
Instead go to the Recorder menu and click on Burn Image...
An open file dialog will open up here
and click on the Ubuntu CD image that you downloaded previously.
and click on open.
That is all there is to it.
Make sure you have a blank CD in your CD burner
and click on Burn to begin the process.