I just came across the coolest utility from PC Magazine. It's call PackEmIn: PackEmIn takes the thinking and time out of burning DVDs and CDs (and other media) efficiently. You simply select the files you want to copy, tell it the media you have, and then burn the files to the media, whether it's CDs, DVDs, or even floppies. It performs all of the complex calculations for you.
Hope this is helpful to the group... Wishing you all the most wonderful Thanksgiving Day!