Audio delay or advance in DVDLab Pro

I have been using DVDLab Pro for some time and I think it's one of the best authoring programs.

Today I tried to author a film that will need some audio correction, either for delaying or advancing it, don't know how many frames yet.

Is there a way to run that within DVDLab Pro and see how much adjustment it will need?

There's a function called Audio Delay which opens a screen to put milliseconds in. As I think I will have to advance the audio one frame at the time, what I did is put the number -33.33, but it asks me for an integer. Anyone knows what should I put there?