You say the PAL one dint work. What do you mean, did it convert properly or your DVD Player did not play it properly ?
The FILM avi will convert to NTSC fine. If your using DVD2SVCD, then the program called Pulldown is run and will "convert" the 23.976 to a 29.97 fps suitable for SVCD playback. Just about all NTSC DVD's sold today are actually FILM but with Pulldown are able to play on a DVD player.