What is the best way to burn 720p/1080 24p footage to a DVD via iDVD or DVD studio pro? Ideally I'd like to have one DVD with both a 16:9 option and letterboxed 4:3 option, so I'm guessing I'd need to make to separate clips. I've always worked with 480i/60i, so I would always burn the clip straight to DVD. But working with DVCPRO-HD footage, what is the best way to do this and get the best results?