assumefps("ntsc_film", sync_audio=true)
lanczos4resize(720, 480)
Then encode as an NTSC DVD.
Pitch correction for the audio, keeping the PAL running time, is possible but may add unwanted artefacts, especially in music.
Then there's the DGPulldown method. More information in this thread: http://originaltrilogy.com/forum/topic.cfm/A-pitch-corrected-Star-Wars-for-PAL/topic/8992/