If you only want it in VCD format I would suggest not to use NTSCfilm or 23.976 fps. A lot of player cannot handle this 23.976 fps very well. Mine is Apex 660ad and wouldn't play right if it's a ntscfilm vcd.
But if you want SVCD format so now you should use ntscfilm or 23.976 with 3:2 pulldown when playback. Oh one more thing to concern, if you choose to go on this road you have to make sure that your dvd is in Film over 80% type, not NTSC otherwise you will get all interace in you encoded movie. Hope this can make you start.