Not sure droppd frames is a computer repair problem. (Look, I just dropped an “e” in my last sentence!) Dropped frames, I find, usually occur during capture when there is glitch in the footage, which happens from time to time. But this isn’t what Raymond is talking about anyway. His film is already edited, and I assume in sync, prior to the ProCoder conversion. So the issue is bringing back the MPG2 and WAV files back into PPro.
Now I’ve never burned a DVD from the timeline; didn’t even know that was possible. Not in CS3. But I have used Encore, which works great. I’m sure there are less expensive DVD authoring programs (like ULead maybe?) which will take the MPGs and WAVs and pump out a cool DVD. Might be worth the investment if you do this often to eliminate your issue. Plus DVD authoring programs will have many more features to make the final product “more betterer”!