Here's a tip. If you are building a DVD that originated via a dynamic link from Premiere sometimes something breaks that causes the encode to take a really really long time. Sometimes I just notice that it should be quicker, sometimes I see that my CPUs are only being used at ~20% instead of nearly 100%. If you stop the process, reboot, and just bring up Encore by itself, all should be well. When this has happened to me it's been when I have Pr and En running and I've updated the project in Pr after En was already up and running.