I was given a Toshiba DR430KC DVD recorder and I would like to finalize the disc after recording a program. Is there a way to change the thumbnail image that appears on the disc before finalizing or am I stuck with the image I see on the top menu. I have figured out how to give each recording its own title but can find nothing in the manual about changing the thumbnail. Every other DVD recorder has had a way to change it so I'm hoping this model does too.