Girls high Dvd (Fields and Frames) need help

[Side Swipe]

Ok I Have the Girls High Dvd's and I'm looking to use the clean closing which it 1:29 long but in dvd shrink it lists as 2:58 and in Dvd Decrypter it lists 2 PGC's under the VTS both are 1:29 and they appear to be the footage i want but I think that t one is meant to be the top field and the other the bottom field of a single frame whan i play the footage from the menu in a dvd player it comes up full screen however when i play the vob from the decript its like hardcore letterboxing thats why i suspect the field frame problem.

My question is does anyone know how to merge the two of these together so I have normal footage clips coming out of virtualdubmod. I wasnt sure it this was the right place to ask this. It seemed to me to be an encoding question... Is this something that can be done in AVISynth