It takes approx 3hrs to build my project to DVD. I often need to cancel because I'm holding up the machine for too long (allotted 2hrs). I hit cancel, then a day later try to build again. It takes just as long because all the files are being transcoded again, including those that completed before I hit cancel. Is there a way, without transcoding individual files after importing, to continue building from where the project left off when I hit cancel? Thank you.

Why not transcode the files prior to building? A few at a time if you need to. I have assumed that files transcoded in a cancelled build are saved, but I love transcoding prior to building, so I'm not sure!