A quick question:
I created a DVD with DVDSP so that the video could be played 16:9 letterbox and also another version Pan and Scan (with subtitles tailored to 4:3).
i simulate and all is as it should be, but when the burned DVD plays through my computer (iMac "17) BOTH are letterbox.
is this a case of the computer making its own decision to show full screen letterbox for the pan scan?
will it play 4:3 on a tv with a DVD player (i WILL test, but access to a DVD player and TV is not quick or easy {i'm in Burundi with all that goes with that...}).
thanks in advance.

Isn't your imac widescreen? Are you saying it has black bars on the top and bottom?

yes, the iMac is widescreen, and there are bars on top and bottom:
it shows the pan and scan version (track in DVDSP assigned as '16:9 pan and scan') as letterboxed. i actually went out and found and purchased a DVD player and tested the DVD, and it showed the letterbox as letterbox and the pan and scan as 4:3, cropped (so, as pan and scan).
relieved that it works as it should on a DVD player and TV, but still wondering why the computer won't show the 'pan and scan' as 4:3 cropped?