Hi Jeff,
the client usually sends me a movie trailer (NTSC/ usually 1080p but also 1080i or even PAL). I put some still images for the background along with the movie theater logo, on a Photoshop file and send it to Premiere. I then put together, both background image(psd) and movie trailer in a Premiere sequence.
–Sequence settings: NTSC/ 720×480/ Fields: Progressive. *This varies according to source file.
As I have to scale down the original video to fit the sequence, I use flicker removal after some bad experiences with flickering subtitles.
Then, I export using a preset: MPEG2-DVD Match Source Highest quality. After that, I import video and audio files to Encore, set the timeline and menu and save as an ISO file. Finally I burn the DVD.