I'm trying to understand one part of mrbass DVD2dvd-r guide or rather one part of it. It's under PAL DVD's: "If it's interlaced, then all options should be turned off, except for bff interlaced video (BV: 'Field topfirst: no') where "Upper Field First" should be checked."

If my PAL DVD is nonlinear, zigzag and interlaced should "upper field First" be checked or not? I checked zigzag scanning and upper field first and unchecked linear and progressive, but my knowledge and english isn't that good so some help would be great!